States of Matter – VI

1) The IUPAC name of HO – CH2CH2-O – CH2CH2 – OH is
a)
b) Bis (2-hydroxyethyl)ether
c) 3-Oxapentane-1,5-diol
d) Diethylene glycol

2) The IUPAC name of the compound is
a) Bicyclo[2,1,0]pentane
b) 1,2-Cyclopropylcyclobutane
c) 1,2-Cyclobutylcyclopropane
d) 1, 2-Methylenecyclobutane

3) The conversion of 2, 3-dibromobutane to 2- butene with Zn and alcohol is a
a) Redox reaction
b) alpha-elimination
c) beta -elimination
d) Both alpha-elimination and redox reaction.

4) The most important constituent of dynamite is
a) T.N.T.
b) Picric acid
c) Nitrobenzene
d) Nitroglycerine.

5) How many acids and esters are possible for the compound with molecular formula, C4H8O2?
a) Two acids + Two esters
b) Two acids + Four esters
c) Four acids + Two esters
d) Three acids + Three esters

6) m-Dinitrobenzene when heated with sodium hydroxide in presence of potassium ferricyanide mainly gives
a) m-Nitrophenol
b) Resorcinol
c) 2, 4-Dinitrophenol
d) 2, 6-Dinitrophenol

7)

The active mass of 68 gms of H2 S in a two litre flask is
a) 0.50
b) 2
c) 0.75
d) 1

8) The sign and magnitude of the Joule Thomson effect in a gas depends upon the
a) Temperature
b) Pressure
c) Temperature and Pressure
d) None of these

9) The temperature at which a gas becomes cooler on expansion is called the
a) Inversion temperature
b) Critical temperature
c) Boyle temperature
d) Transitional temperature

10) When two atoms of hydrogen combine to form a molecule of hydrogen gas, the energy of the molecule is
a) Higher than that of the separate atoms
b) Equal to that of the separate atoms
c) Lower than that of the separate atoms
d) Sometimes lower and sometimes higher

Acids and Bases

See the differences between acids and bases, and find out why they act the way they do.

It is widely known that lemons taste sour due to their acid content, soil needs the optimum pH level for plants to grow properly and acid rain can wipe out entire ecosystems. But what really makes one thing acidic and the other one basic (alkaline)? Why can they be so corrosive? And why does litmus paper turn different colours when dipped in acid or a base?
Acids and bases can be defined in terms of their concentration of hydrogen ions. Normally an atom of hydrogen consists of one proton and one electron giving it a balanced electrical charge – protons being positively charged and electrons being negatively charged. Take away the electron and you are left with an ion of hydrogen, or a single proton, or ‘H+’, as it is often written. The thing about ions is they are very reactive, as they no longer have a balanced charge. They are constantly seeking ions of the opposite charge – an atom or molecule with an unequal number of electrons than protons, with which to react.
A strong acid has a high concentration of H+ ions and is defined by its ability to ‘donate’ hydrogen ions to a solution, whereas a base, also know as an alkali, has a much lower concentration of H+ ions and is defined by its ability to ‘accept’ hydrogen ions in a solution. Therefore, acids mixed with bases become less acidic and bases mixed with acids become less basic, or less alkaline.
Certain concentrated bases, like some concentrated acids, can attack living tissue and cause severe burns due to the ions reacting with the skin. However, the process of bases reacting with the skin, and other materials, is different to that of acids. That’s why we call some concentrated acids ‘corrosive’, whereas reactive concentrated bases are ‘caustic’.

The power of hydrogen
The letters pH stand for ‘power of hydrogen’, as the scale refers to the concentration of hydrogen (H+) ions in the solution. It measures the acidity or basicity of a solution, with pH values ranging from 0-14, 0 being really acidic and 14 being really basic. A substance in the middle of the scale with a pH of 7 is classed as neutral, as it contains equal numbers of oppositely charged ions.

Acid
A compound which ‘donates’ hydrogen ions when placed in an aqueous solution. The higher the concentration of hydrogen ions released, the stronger the acid.

acidsFind pH with litmus tests
We can test the acidity or alkalinity of a substance using litmus paper. Litmus paper is that which has been treated with a mixture of 10-15 natural dyes obtained from lichens. The dyes work as indicators, whereby upon exposure to acids (a pH less than 7) the paper turns red and upon exposure to bases (a pH more than 7) the paper turns blue. When the pH is neutral (pH equal to 7), the dyes cause the paper to turn purple.
Red cabbage juice can also be used to distinguish between acids and bases, as it contains a natural pH indicator called ‘flavin’. Upon exposure to acid, flavin turns a red colour, neutral solutions appear a purple colour and basic solutions result in a greenish-yellow colour.
bases

Neutralisation
A neutralisation reaction is the combination of an acid and base that results in a salt and, usually, water. In strong bases and acids, neutralisation is the result of the exchange of hydrogen and hydroxide ions, H+ and H- respectively, which produces water. With weak acids and bases, neutralisation is simply the transfer of protons from an acid to a base. The production of water, with a neutral pH of 7, indicates the neutralisation of the acid and base, while the resultant salt will often have a pH that is also neutral. Neutralisation has a variety of practical uses. For example, as most plants grow best at neutral pH7, acidic or alkaline soil can be treated with chemicals to change its pH. In the case of acidic soil this is often calcium carbonate (chalk) or calcium oxide (quicklime). Another example is the human stomach, which contains hydrochloric acid. However, too much can lead to indigestion, so the acid can be neutralised with a base such as an indigestion tablet.

acid-base-reaction

The Human Hand

The human hand is an important feature of the human body which allows individuals to manipulate their surroundings and also to gather large amounts of data from the environment that the individual is situated within. A hand is generally defined as the terminal aspect of the human arm, which consists of prehensile digits, an opposable thumb, and a wrist and palm. Although many other animals have similar structures, only primates and a limited number of other vertebrates can be said to have a ‘hand’ due to the need for an opposable thumb to be present and the degree of extra articulation that the human hand can achieve. Due to this extra articulation, humans have developed fine motor skills allowing for much increased control in this limb. Consequently we see improved ability to grasp and grip items and development of skills such as writing.

A hand is made up of five digits, the palm and wrist. It consists of 27 bones, tendons, muscles and nerves, with each fingertip of each digit containing numerous nerve endings making the hand a crucial area for gathering information from the environment using one of man’s most crucial five senses: touch. Muscles interact together with tendons to allow fingers to bend, straighten, point and, in the case of the thumb, rotate. However, the hand is an area that sees many injuries due to the number of ways we use it, one in ten injuries in A&E being hand related, and there are also several disorders that can affect the hand development in the womb, such as polydactyly, where an individual is born with extra digits, which are often in perfect working order.

human-handThe human hand contains 27 bones, and these divide up into three distinct groups: the carpals, metacarpals and phalanges. These also then further break down into three: the proximal phalanges, intermediate phalanges and distal phalanges. Eight bones are situated in the wrist and these are collectively called the carpals. The metacarpals, which are situated in the palm of the hand account for a further five out of the 27, and each finger has three phalanges, the thumb has two. Intrinsic muscles and tendons interact to control movement of the digits and hand, and attach to extrinsic muscles that extend further up into the arm, which fl ex the digits.

Muscles and other structures

The movements and articulations of the hand and by the digits are controlled by tendons and two muscle groups situated within the hand and wrist. These are the extrinsic and intrinsic muscle groups, so named as the extrinsics are attached to muscles which extend into the forearm, whereas the intrinsics are situated within the hand and wrist. The flexors and extensors, which make up the extrinsic muscles, use either exclusively tendons to attach to digits they control (flexors) or a more complex mix of tendons and intrinsic muscles to operate (extensors). These muscles will contract in order to cause digit movement, and flexors and extensors work in a pair to complement each to straighten and bend digits. The intrinsic muscles are responsible for aiding extrinsic muscle action and other movements in the digits and have three distinct groups; the thenar and hypothenar (referring to the thumb and little finger respectively), the interossei and the lumbrical.

forearmExtrinsic muscles are so called because they are primarily situated outside the hand, the body of the muscles situated along the underside or front of the forearm. This body of muscles actually breaks down into two quite distinct groups: the flexors and the extensors. The flexors run alongside the underside of the arm and allow for the bending of the digits, whereas the extensor muscles’ main purpose is the reverse of this action, to straighten the digits. There are both deep and superficial flexors and extensors, and which are used at any one time depends on the digit to be moved.

Co ordination compounds – MCQs 3

1) @ The complex [Co(NH3)5Br]SO4 will give a white precipitate with
a)
b)
c)
d) None

2) Which will not give the usual test for iron?
a)
b)
c)
d)

3) The value of x in the complex Fe(CO)x is
a) 5
b) 4
c) 8
d) 3

4) The hybridisation in Ni(CO)4 is
a) sp
b)
c)
d)

5) The colour of FeSO4 .(NH4)2SO4 .6H2O is
a) Red
b) White
c) Green
d) Blue

6) The number of ions formed in aqueous solution by the compound [Co(NH3)4Cl2]Cl is
a) 2
b) 3
c) 4
d) 7

7) In complexes, the primary valency of the metal is always
a) Ionic
b) Covalent
c) Zero
d) None

8) Which of the following cation does not form an amine complex with excess of ammonia ?
a)
b)
c)
d)

9) Complexes with bidentate ligands are called.
a) Ligands
b) Chelates
c) Complexes
d) None

10) The outer complexes are generally formed by
a) Strong ligands
b) Weak ligands
c) Neutral ligands
d) None

11) Which of the following will exhibit cis-trans isomerisation ?
a)
b)
c) MABCD
d)

12) All ligands are
a) Lewis acids
b) Lewis bases
c) Neutral
d) None

13) The shape of the cobalt hexamine cation, which has its central cobalt atom surrounded by six ammonia molecules is
a) Tetrahedral
b) Octahedral
c) Square planar
d) Trigonal

14) The complex [Pt(NH3)6]Cl4 furnishes
a) 5 ions
b) 6 ions
c) 4 ions
d) 2 ions

15) Which of the following is not an organometallic compounds ?
a) Trimethyl boron
b) Trimethyl orthoborate
c) Diethyl magnesium
d) Butyl ethyl mercury

16) Which one of the following will give a white precipitate with AgNO3 in aqueous solution ?
a)
b)
c)
d)

17) @ Which of the following has tetrahedral geometry ?
a)
b)
c)
d)

18) The complex [Co(NH3)3Cl3] is
a) Neutral
b) Cationic
c) Anionic
d) None

19) A group of atoms can function as a ligand only when
a) It is a small molecule
b) It has an unshared electron pair
c) It is a negatively charged ion
d) It is a positively charged ion

20) The metal hydroxide which is soluble in excess of NH4OH is
a)
b)
c)
d)

21) The total number of ions produced when one molecule of [Co(NH3)6]Cl3 undergoes ionisation is
a) 1
b) 2
c) 3
d) 4

22) Complexation is shown by
a) Ag
b) Au
c) Cu
d) All

23) Ionisation of K[Ag(CN)2] will give
a)
b) KCN and AgCN
c)
d) None

24) Turnbulls blue is
a) Ferricyanide
b) Ferrous ferricyanide
c) Ferrous cyanide
d) Ferri-ferrocyanide

25) The probable formula for Prussian blue is
a)
b)
c)
d)

26) In which solvent will AgBr have highest solubility ?
a)
b)
c) Pure water
d)

27) Which of the following is not true for a ligand-metal complex ?
a) The larger the ligand, the more stable is the metal-ligand complex
b) A highly charged ligand forms stronger bonds
c) The larger the permanent dipole moment of the ligand, the more stable is the bond
d) The greater the ionisation potential of the central metal, the stronger the bond

28) In haemoglobin the iron is in the following oxidation state:
a) +2
b) +3
c) +1
d) +4

29) The oxidation state of Ni in the [Ni(CN)4]2- ion is
a) -2
b) +2
c) +4
d) 0

30) The oxidation number of nickel in K2[Ni(CN)4] is
a) -2
b) +2
c) -1
d) 0

31) The hybridisation of Mn in hexacyano-manganate (II) is sp3d2. The number of unpaired electrons in it is
a) 1
b) 2
c) 5
d) 3

32) The compound which does not show paramagnetism is
a)
b)
c)
d)

33) The EAN of Cr (Z = 24) in [Cr(NH3)6]Cl2 is
a) 35
b) 36
c) 27
d) 34

34) Prussian blue is formed when
a)
b)
c)
d)

35) Ligands in a complex salt are
a) Anions linked by co-ordinate bonds to a central metal atom or ion
b) Cations linked by co-ordinate bonds to a central metal atom or ion
c) Molecules linked by co-ordinate bonds to a Central metal or ion
d) Ions or molecules linked by co-ordinate bonds to a central atom or ion

36) The co-ordination number of chromium in the complex [Cr(NH3)2(H2O)2]Cl3 is
a) 4
b) 6
c) 2
d) 3

37) Which of the following is a monodentate ligand ?
a)
b)
c)
d) All the above

38) Which of the following act as catalysts ?
a)
b)
c)
d) Both (a) and (b)

39) The formation of a complex compound can be detected by the
a) Change in colour
b) Change in solubility
c) Change in pH
d) All are correct

40) Which of the following is not correct in the case of [Co(NH3)6]3+ complex ?
a) It is octahedral in shape
b)
c) It is diamagnetic
d) All are correct

41) Which of the following is not correct in the case of [Ni(CN)4]2- complex ?
a)
b) It has square planar shape
c) It is diamagnetic
d) All are correct

42) Which is not correct in the case of [Cu(NH3)4]2+ complex ?
a)
b) Paramagnetic
c) Square planar
d) All are correct

43) Which of the following is correct in the case of [NiCl4]2- complex ?
a)
b) Paramagnetic
c) Tetrahedral
d) All are correct

44) Which is correct in the case of [Fe(CN)6]4- complex ?
a) Diamagnetic
b) Octahedral
c)
d) All are correct

45) Which is correct in the case of [Fe(CN)6]3- complex ?
a)
b) Paramagnetic
c) One unpaired electron
d) All are correct

46) The shape of [Cu(NH3)4]2+ is square planar. Cu in this complex is
a)
b)
c)
d)

47) The oxidation state of Ag in Tollens reagent is
a) +1
b) -1
c) 0
d) +2

48) The magnetic behaviour of the complexes K4[Fe(CN)6] and K3[Fe(CN)6] is respectively
a) Paramagnetic, diamagnetic
b) Diamagnetic, paramagnetic
c) Diamagnetic, ferromagnetic
d) Diamagnetic

49) The stability constants of some reactions are given below. Predict which of the ligands is strongest.
a)
b)
c)
d)

50) The planar complex (MABCD) gives
a) Two geometrical isomers
b) Two optical isomers
c) Three geometrical isomers
d) None

51) The effective atomic number of Fe (Z = 26) in Fe (CO)5 is
a) 26
b) 34
c) 54
d) 36

52) Which of the following complexes have tetrahedral shape (sp3 hybridisation of central atom) ?
a)
b)
c)
d) All are correct

53) Which of the following complexes have octahedral shape due to sp3 d2 hybridisation of the central atom ?
a)
b)
c)
d) All are correct

54) Which of the following complexes has a square planar shape due to dsp2 hybridisation ?
a)
b)
c)
d) All are correct

55) Which of the following is a complex ?
a) Trimethyl aluminium
b) Ferrocene
c) Diethyl zinc
d) Nickel carbonyl

56) The formula of ferrocene is
a)
b)
c)
d)

57) The number of precipitable halide ions [Pt(NH3)CI2Br]Cl is
a) 2
b) 3
c) 4
d) 1

58) EDTA is
a) 3-co-ordinate
b) 2-co-ordinate
c) 4-co-ordinate
d) 6-co-ordinate

59) The co-ordination number of cobalt in Co(en)2Br2]Cl2 is
a) 2
b) 4
c) 6
d) 8

60) A blue solution of CuSO4 becomes darker when treated with ammonia solution, because
a) the ammonia molecule replaces the water molecule in solution
b) Ammonia is a stronger ligand than water
c) Ammonia forms a stable complex
d) None of these

61) Potassium hexacyanoferrate (II) is the compound
a)
b)
c)
d)

62) The formula of ruthenium carbonyl is
a)
b)
c)
d)

63) Which of the following shows only the co-ordination number 4 in complexes ?
a)
b)
c)
d)

64) Which of the following shows only the co-ordination number 6 ?
a)
b)
c)
d) All are correct

65) Which of the following statements about the coordination number of a cation is true ?
a) Most metal ions exhibit only a single characteristic co-ordination number
b) The co-ordination number is equal to the number of ligands bonded to the metal atom
c) For most cations, the co-ordination number depends on the size, structure and charge of the ligands
d) None of these

66) For which of the following transition metal ions are low spin complexes possible ?
a)
b)
c)
d) All are correct

67) Which of the following cations forms an acidic aqueous solution ?
a)
b)
c)
d) All are correct.

68) Which of the following ions produces a small crystal field splitting (a weak ligand field) ?
a)
b)
c)
d) All are correct

69) Which of the following ligands produce a high crystal field splitting (a strong ligand field) ?
a) CO
b)
c)
d) All are correct

70) Complexes with halide ligands are generally
a) High spin complexes
b) Low spin complexes
c) Both
d) None

71) Complexes with CN ligands are usually
a) High spin complexes
b) Low spin complexes
c) Both
d) None

72) The tetrahedral crystal field splitting is only ____ of the octahedral splitting
a) 1/9
b) 2/9
c) 4/9
d) 5/9

73) The effective atomic rule is less likely to apply if the metal – ligand bond
a) Is extremely weak
b) Has a covalent character
c) Has a large tendency towards ionic character
d) None is correct

74) Which of the following orders is correct for the spectrochemical series of ligands ?
a)
b)
c)
d)

75) Which of the following is a low spin complex ?
a)
b)
c)
d) All are correct

76) Which of the following is a high spin complex ?
a)
b)
c)
d) All are correct

77) The hybridisation of Cr in [Cr(H2O)6]3+ is
a)
b)
c)
d)

78) Which one of the following octahedral complexes is diamagnetic ?
a)
b)
c)
d)

79) Metal carbonyls are organo metallic compounds in which carbon monoxide acts as the ligand. The metal-carbon bond in metal carbonyls possesses both sigma and pi character. Which of the following metal carbonyls is diamagnetic and has tetrahedral geometry ?
a)
b)
c)
d)

80) A cobaltamine has the formula Co(NH3)6 Cl3. With AgNO3 solution, one third of the chloride is precipitated. The complex shows cis – trans isomerism. It can have the structure :
a)
b)
c)
d)

81) The colour of an aqueous solution of CrCl3 varies from violet to green depending upon concentration. This variation is due to the formation of
a)
b)
c)
d) All of these

82) Which of the following ions gives no change when aqueous alkali is added dropwise ?
a)
b)
c)
d)

83) A ligand is essentially a Lewis base. Which one of the following is a polydentate ligand ?
a)
b) CO
c)
d) E.D.T.A

84) In complexes, the ligands are linked to the central metal atom or ion by
a) Dative bonds
b) Ionic bonds
c) H-bonds
d) van der Waals forces

85) Which one of the following complexes is not linear ?
a)
b)
c)
d)

86) A hydrate of Cr, Cr(H2O)6 Cl3 , gives 3 moles of AgCl when treated with excess solution. Its structure is
a)
b)
c)
d)

87) Octahedral complex (C.N = 6) shows cis-trans isomerism if they are of the type
a)
b)
c)
d)

88) A typical example of a sandwiched compound is
a) Ferrocene
b)
c)
d)

89) Wilkinsons catalyst is
a)
b) Used in the hydrogenation of alkenes
c) a homogeneous catalyst
d) All the above

90) The ultimate product formed by hydrated iron (III) ions in an aqueous solution of pH= 5 is
a)
b)
c)
d)

91) Which one of the following salts does not produce a complex ion M(H2O)2+6 when dissolved in excess of water ?
a)
b)
c)
d)

92) In which of the following ions is the transition metal not exhibiting its highest common oxidation state ?
a)
b)
c)
d)

93) Ferrocene is an example of
a) a sandwiched complex
b) A pi-bonded complex
c) A complex in which all the five carbon atoms of cyclopentadiene anion are bound to the metal
d) All the above

94) Which one of the following is not a sigma bonded complex ?
a)
b)
c) n-butyllithium
d) Dibenzene chromium

95) Which of the following is not an organometallic compound ?
a)
b)
c)
d) All are correct

96) Geometrical isomerism is not possible in
a)
b)
c) MABCD
d) All

97) Haemoglobin is the complex of
a)
b)
c)
d)

98) Chlorophyll is the complex of
a)
b)
c)
d)

99) The oxidation state of the ligand in a complex is
a) Zero
b) Green
c) Always positive
d) Zero or negative

100) The stability of a complex depends on the
a) Basicity of the ligands
b) Charge on the central metal ion
c) Both (a) and (b)
d) None


Answer

Co-ordination Compounds – 2

1) Nitroglycerine is absorbed in porous dried clay called Kieselguhr and commercially used as a controlled explosive called.
a) Gun powder
b) T.N.T
c) Dynamite
d) Napalm

2) In compounds having coordination number 4, two principal geometries encountered are
a) Linear & bent
b) Trigonal planar and trigonal pyramidal
c) Cis form and trans form
d) Tetrahedral and square planar

3) The ion which exhibits a green colour is
a)
b)
c)
d)

4) Lanthanides form complexes with
a) Monodentate ligands
b) Bidentate ligands
c) Chelating agents
d) Simple anions

5) The Effective Atomic Number of Cu in [Cu(SCN)6]3- is
a) 35
b) 38
c) 34
d) 37

6) The co-ordination number and oxidation state of Al in the complex [Al(H2O)4(OH)2] are respectively
a) 5, +3
b) 6, +3
c) 6, +2
d) 4, +4

7) The co-ordination number and oxidation state of Cr in K3Cr(C2O4)3 are respectively
a) 4 and +2
b) 6 and +3
c) 3 and +3
d) 3 and 0

8) The complex compound of nickel in which Ni is in dsp2 hybridised state is
a)
b)
c)
d) None of these

9) Which of the following is an example of dsp2 hybridisation?
a)
b)
c)
d)

10) The total number of isomers for the complex compound [CuII(NH3)4] [PtIICl4] is
a) 4
b) 3
c) 6
d) 5

11) A co-ordination complex compound of cobalt has a molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of silver nitrate solution, two moles of AgCl are precipitated. The ionic formula of this compound would be
a)
b)
c)
d)

12) The geometry of Ni(CO)4 and Ni(PPH3)2Cl2 are
a) Both square planar
b) Tetrahedral and square planar respectively
c) Both tetrahedral
d) Square planar and tetrahedral respectively

13) Which is not a bonded complex?
a)
b) Ferrocene
c) Dibenzene chromium
d) Tetraethyl lead

14) Which is paramagnetic?
a)
b)
c)
d)

15) The formula dichlorobis (urea) copper (II) is.
a)
b)
c)
d)

16) Which of the following has a square planar structure?
a)
b)
c)
d) All of these

17) In which of the following compounds does the central metal atom obey the EAN  rule?
a) All
b)
c)
d)

18) Which of the following is paramagnetic?
a)
b)
c)
d)

19) Which of the following is an organometallic compound?
a)
b)
c)
d)

20) Which of the following is an organo metallic compound?
a) Lithium methoxide
b) Lithium acetate
c) Lithium dimethyl amide
d) Methyl lithium

21) The number of enantiomers of the compound CH3CHBrCHBr – CH3 is
a) 0
b) 1
c) 3
d) 4

22) Which of the following are organometallic compounds ?
a)
b)
c)
d) Both (b) and (c)

23) The number of geometrical isomers from [Co(NH3)3 (NO2)3] is
a) 2
b) 3
c) 4
d) None

24) Which of the following compounds is not coloured?
a)
b)
c)
d)

25) The unpaired electrons in Ni(CO)4 are
a) Zero
b) One
c) Three
d) Four

26) Which of the following complex will show geometrical as well as optical isomerism [En = ethylene diamine] ?
a)
b)
c)
d)

27) The oxidation state of Fe in the brown complex, Fe[(H2O)5NO]SO4 is
a) + 1
b) + 2
c) + 3
d) + 4

28) Among [Ni(CN)4]2-, [NiCl4]2- and [Ni(CO)4]
a)
b)
c)
d) None

29) The EAN of platinum in potassium hexachloroplatinate (IV) is
a) 46
b) 86
c) 36
d) 84

30) The EAN of Ni in K2[Ni(CN)4] is
a) 35
b) 34
c) 36
d) 38

31) The hybridisation of Fe in K4[Fe(CN)6] complex is
a)
b)
c)
d)

32) The [Cr(NH3)6]3+ ion is
a) Paramagnetic
b) Diamagnetic
c) Square planar
d) Tetrahedral

33) The oxidation number of Fe in K4[Fe(CN)6] is
a) +3
b) +2
c) +1
d) -3

34) Among [Ni(CO)4], [Ni(CN)4]2- and [Ni(Cl)4]2- ,
a)
b)
c)
d)

35) The number of ions formed in aqueous solution by the compound  [Co(NH3)4Cl2]Cl is
a) 2
b) 3
c) 4
d) None

36) The co-ordination number of Co in [Co(NH3)6]2+ is
a) 4
b) 6
c) 5
d) 8

37) The charge on cobalt in [Co(CN)6]3- is
a) -6
b) +3
c) -3
d) +6

38) The number of isomers possible for the square planar complex K2[PdClBr2SCN] is
a) 2
b) 3
c) 4
d) 5

39) Geometrical isomerism is found in co-ordination compounds having the co-ordination number
a) 2
b) 3
c) 4 (Tetrahedral)
d) 6

40) The shape of the complex Ag(NH3)+2 is
a) Octahedral
b) Square planar
c) Tetrahedral
d) Linear

41) A square planar complex is represented as
a) Geometrical isomers
b) Optical isomers
c) Linkage isomers
d) None

42) Which of the following is non-ionisable?
a)
b)
c)
d)

43) In which of the following complexes is the oxidation state of metal zero?
a)
b)
c)
d)

44) Which of the following complexes shows ionisation isomerism?
a)
b)
c)
d)

45) The IUPAC name of K3[Fe(CN)6] is
a) Potassium ferrocyanide
b) Potassium hexaferrocynate
c) Potassium hexaferrocynate (II)
d) Potassium hexacyanoferrate (III)

46) Which among the following ions has the highest paramagnetism?
a)
b)
c)
d)

47) The number of d-electrons in [Cr(H2O)6]3+ is
a) 2
b) 3
c) 4
d) 5

48) Which one of the following shows the maximum paramagnetic behaviour?
a)
b)
c)
d)

49) Which type of isomerism is shown by the complex compounds [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br ?
a) Ionic
b) Linkage
c) Co-ordinate
d) Optical

50) The effective atomic number of Cr (Z = 24) in [Cr(NH3)6]Cl3 is
a) 35
b) 27
c) 33
d) 36

51) The fraction of chlorine precipitated by AgNO3 solution from [Cu(NH3)5Cl]Cl2 is
a) 1/2
b) 2/3
c) 1/3
d) 1/4

52) K3CoF6 is a high spin complex. What is the hybrid state of the Co atom in this complex?
a)
b)
c)
d)

53) Nickel has the highest oxidation state in
a)
b)
c)
d)

54) [(C6H5)2Pd(SCN)2] and [(C6H5)2 Pd (NCS)2] are
a) Linkage isomers
b) Co-ordination isomers
c) lonisation isomers
d) Geometrical isomers

55) Which of the following compounds would exhibit co-ordination isomerism?
a)
b)
c)
d)

56) Hexachloro cobaltate (III) ion is found to be a high spin complex. The hybridisation of cobalt in it is
a)
b)
c)
d)

57) The type of isomerism shown by [Co (en) 2(NCS) 2] Cl and  [Co(en)2(NCS)Cl]NCS
a) Co-ordinate
b) lonisation
c) Linkage
d) All the above

58) Hexafluoro ferrate (III) ion is an outer orbital complex. The number of unpaired electrons present in it is
a) 1
b) 3
c) 4
d) 5

59) [Fe(CN)6]4- ion is
a) Octahedral
b) Square planar
c) Bipyramidal
d) Tetrahedron

60) The central ion and ligand in the complex K2[Cd(CN)4] are respectively
a)
b)
c)
d)

61) A complex of platinum, ammonia and chlorine produces 4 ions per molecule in the solution. The structure of the complex may be
a)
b)
c)
d)

62) The possible number of isomers for the complex [MCl2Br2]SO4 is
a) 1
b) 2
c) 4
d) 5

63) The oxidation number of Pt in [Pt(C2H4)Cl3] is
a) + 1
b) + 2
c) + 3
d) + 4

64) The number of electrons gained by Pd in [PdCl4]2- is
a) 8
b) 4
c) 10
d) Zero

65) Which type of isomerism is exhibited by [Co(NH3)4Cl2]NO2 and [Co(NH3)4ClNO2]Cl ?
a) Geometrical
b) Optical
c) Linkage
d) lonisation

66) Which complex has square planar structure?
a)
b)
c)
d)

67) The co-ordination number of copper in cuprammonium sulphate is
a) 2
b) 4
c) 3
d) 6

68) Which one of the following is not expected to show paramagnetism?
a)
b)
c)
d)

69) The oxidation number of Fe in the compound Na4[Fe(CN)5NO]SO4.2H2O is
a) 0
b) + 1
c) + 2
d) + 3

70) In triethylenediamine cobalt (III) chloride, the co-ordination number of cobalt is
a) 3
b) 4
c) 6
d) 7

71) The number of geometrical isomers of [Co(NH3)3(NO2)3] are
a) 0
b) 2
c) 3
d) 4

72) Which exhibits higher molar conductivity?
a)
b)
c)
d)

73) The EAN of Cr in [Cr(SCN)6]3- is
a) 35
b) 33
c) 34
d) 37

74) Which ligand is capable of forming low spin as well as high spin complexes?
a) CO
b)
c)
d)

75) In which of the following ions does the metal atom have an EAN = 36?
a)
b)
c)
d)

76) The complex that violates the EAN is
a) potassium ferrocyanide
b) potassium ferricyanide
c) Nickel carbonyl
d) Cobalt (III) hexaammine chloride

77) The IUPAC name of Pt(NH3)5(Br)(NO2)Cl]Cl is
a) Triaminechlorobromonitroplatinium (IV) chloride
b) Triaminebromonitrochloroplatinium (IV) chloride
c) Triaminebromochloronitroplatinium (IV) chloride
d) Triaminenitrochlorobromoplatinium (IV) chloride

78) Which of the following is a high spin complex?
a)
b)
c)
d) All the above

79) The number of ions formed when copper ammonium sulphate is dissolved in water is
a) 1
b) 2
c) 4
d) 3

80) The oxidation state of Mn in its oxo-complex species [Mo2O4(C2H4)2 (H2O)2]2- is
a) + 2
b) + 3
c) +4
d) + 5

81) The co-ordination number of copper in the complex formed by adding excess of NH3 to CuSO4 solution is.
a) 4
b) 2
c) 6
d) 5

82) The compound [Co(NO2)(NH3)5]Cl2 and [Co (ONO)(NH3)5]Cl2 are examples of
a) Geometrical isomers
b) Linkage isomers
c) Ligand isomers
d) lonisation isomers

83) The complex ion [Cu(NH3)4]2+ has a
a) Tetrahedral configuration with one unpaired electron configuration
b) Square planar configuration with one unpaired electron
c) Tetrahedral configuration with all electrons paired
d) Square planar configuration with all electrons paired

84) Cis-trans isomerism is found in square planar complexes of the molecular formula (a and b are the monodentate ligands)
a)
b)
c)
d)

85) Transition elements form complexes readily because of the
a) Same size of cation
b) Vacant d-orbitals
c) Large ionic charge
d) All

86) The structure of iron pentacarbonyl is
a) Square planar
b) Trigonal bipyramid
c) Triangular
d) None

87) The groups satisfying the secondary valencies of a cation in a complex are called
a) Ligands
b) Radicals
c) Primary valencies
d) None

88) The co-ordination number of Fe in K3[Fe(CN)6] is
a) 2
b) 3
c) 4
d) 6

89) AgO in Ag (II) complex is
a) Diamagnetic
b) Paramagnetic
c) Ferromagnetic
d) None

90) The complex forming tendency increases with the
a) Increase in size of the cation
b) Decrease in size of the cation
c) Increase in size of the anion
d) None

91) Which statement is not correct?
a)
b) Carbonyl complexes are usually formed with transition metals
c) All transition metals form monometallic carbonyls
d)

92) In [Cr(NH3)4Cl2]Cl the ligands are
a)
b)
c)
d)

93) Which ligand is expected to be bidentate?
a)
b)
c)
d)

94) Which will give a white precipitate with AgNO3 in aqueous solution?
a)
b)
c)
d)

95) The structure of the [Cu(H2O)4]2+ ion is
a) Square planar
b) Tetrahedral
c) Octahedral
d) Distorted rectangle

96) The two compounds sulphatopentamine cobalt (III) bromide and sulphato pentamine cobalt (III) chloride represent
a) Linkage isomerism
b) lonisation isomerism
c) Co-ordination isomerism
d) No isomerism

97) [Co(NH3)4Cl2] possesses
a) Square planar geometry
b) Tetrahedral geometry
c) Octahedral geometry
d) None

98) The tendency of the transition metals to form complexes is not explained by the
a) Small size of the metal ion
b) Large ionic or nuclear charge
c) Low basicity of metal ions
d) Non-availability of d-orbitals

99) The oxidation state of Fe in Na3[Fe(NH3)(CN)5]2H2O is
a) – 1
b) + 1
c) + 2
d) 3

100) Which is a colourless complex?
a)
b)
c)
d)


Answer