JEE Chemistry Coordination Compounds MCQs Set C

Question: The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes,

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following statements related to crystal field splitting in octahedral coordination entities is incorrect?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following is incorrect regarding spectrochemical series?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) CO
• b) Cl^–
• c) SCN^–
• d) S^2–

Answer: CO

Question:

• a) Colourless
• b) Red
• c) White
• d) Green

Answer: Colourless

Question: Which of the following is the limitation of crystal field theory?

(i) Ligands are assumed as point charges.

(ii) It does not accounts for the covalent character of bonding between the ligand and the central atom.

(iii) It does not explain how colour of coordination compounds depends on ligand attached to central metal atom/ion.

• a) (i) and (ii)
• b) (ii) only
• c) (ii) and (iii)
• d) (i), (ii) and (iii)

Answer: (i) and (ii)

Question: If magnetic moment of [MnBr₄]^2– is 5.9 BM. Predict the number of electrons?

• a) 5
• b) 3
• c) 2
• d) 6

Answer: 5

Question:

• a) b, a, c, d
• b) d, c, a, b
• c) d, a, c, b
• d) a, b, c, d

Answer: b, a, c, d

Question: Which of the following does not have a metal- carbon bond?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: In Fe(CO)₅, the Fe – C bond possesses

• a)

  

• b)

  

• c)

  

• d) ionic character

Answer:

Question: The charge on the central metal ion in the complex [Ni(CO)₄] is

• a) 0
• b) + 2
• c) + 2
• d) + 3

Answer: 0

Question: The unpaired electrons in Ni(CO)₄ are

• a) zero
• b) three
• c) one
• d) four

Answer: zero

Question: The correct structure of Fe(CO)₅ is (Z=26 for Fe)

• a) trigonal pyramidal
• b) tetrahedral
• c) octahedral
• d) square pyramidal

Answer: trigonal pyramidal

Question:

• a) larger the stability constant, higher the proportion of ML₄ that exists in solution
• b) smaller the stability constant, higher the proportion of ML₄ that exists in solution
• c) larger the stability constant, lower the proportion of ML₄ that exists in solution
• d) None of the above

Answer: larger the stability constant, higher the proportion of ML₄ that exists in solution

Question: Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect ?

• a) Chlorophylls are green pigments in plants and contain calcium
• b) Haemoglobin is the red pigment of blood and contains iron
• c) Carboxypeptidase - A is an exzyme and contains zinc
• d) None of these

Answer: Chlorophylls are green pigments in plants and contain calcium

Question: Which one of the following coordination compounds is used to inhibit the growth of tumours?

• a) Cis-platin
• b) EDTA complex of calcium
• c) Trans-platin
• d) None of these

Answer: Cis-platin

Question: For [Co₂(CO)₈], what is the total number of metal – carbon bonds and number of metal–metal bonds

• a) 10 ,1
• b) 8, 1
• c) 8, 2
• d) 10, 0

Answer: 10 ,1

Question:

• a)

  

• b)

  

• c)

  

• d) All of the above are correct

Answer:

Question:

• a) 2.7
• b) 2.5
• c) 2.0
• d) 3.0

Answer: 2.7

Question: Identify the correct statements for the behaviour of ethane- 1, 2-diamine as a ligand.

(i) It is a neutral ligand.

(ii) It is a didentate ligand.

(iii) It is a chelating ligand.

(iv) It is a unidentate ligand.

• a) (i), (ii) and (iii)
• b) (iii) and (iv)
• c) (ii) and (iii)
• d) (i), (iii) and (iv)

Answer: (i), (ii) and (iii)

Question: Read the following statements

(i) Macromolecules cannot behave as a ligand.
(ii) [EDTA]^4– can bind through two oxygen and four nitrogen atom.
(iii) Chelate complexes are more stable than similar complexes containing unidentate ligands.
(iv) Coordination number of the central atom/ion is determined only by the number of sigma bonds formed by the ligand with central atom/ion
Which of the following is the correct code for statements above?

• a) FFTT
• b) TFTF
• c) FTFT
• d) FFFT

Answer: FFTT

Question: Which of the following statements regarding formulas and naming of coordination compounds are correct?

(i) During nomenclature names of neutral ligands are kept same except for H₂O, NH₃ and CO.
(ii) If the complex is anion, the name of the metal ends with the suffix–ate.
(iii) While writing formula of coordination compounds polydentate ligands are listed alphabeticaly.
(iv) The cation is named first in both positively and negatively charged coordination entities.

• a) (i), (ii), (iii) and (iv)
• b) (ii), (iii) and (iv)
• c) (i), (ii) and (iii)
• d) (i), (iii) and (iv)

Answer: (i), (ii), (iii) and (iv)

Question:

• a) (i), (iii) and (iv)
• b) (iii), (iv) and (v)
• c) (i), (ii) and (iii)
• d) (ii), (iii) and (v)

Answer:  (i), (iii) and (iv)

Question:

• a) (ii) and (iii)
• b) (ii), (iii) and (iv)
• c) (i), (ii) and (iii)
• d) (i), and (ii)

Answer: (ii) and (iii)

Question:

• a) None of these
• b) (iii) only
• c) (i) and (ii)
• d) (ii) only

Answer: None of these

Question:

• a) A – (p), B – (r), C – (q), D – (s)
• b) A – (p), B – (q), C – (s), D – (p)
• c) A – (p), B – (q), C – (r), D – (s)
• d) A – (p), B – (r), C – (q), D – (s)

Answer: A – (p), B – (r), C – (q), D – (s)

Question:

• a) A – (p), B – (r), C – (s), D – (q)
• b) A – (q), B – (s), C – (p), D – (r)
• c) A – (p), B – (r), C – (q), D – (s)
• d) A – (s), B – (p), C – (q), D – (r)

Answer: A – (p), B – (r), C – (s), D – (q)

Question:

• a) A – (u), B – (s), C – (p), D – (q), E – (r)
• b) A – (q), B – (s), C – (p), D – (u), E – (r)
• c) A – (q), B – (s), C – (p), D – (u), E – (t)
• d) A – (u), B – (s), C – (p), D – (q), E – (t)

Answer: A – (u), B – (s), C – (p), D – (q), E – (r)

Question:

• a) A – (r), B – (p), C – (q)
• b) A – (q), B – (r), C – (p)
• c) A – (p), B – (r), C – (q)
• d) A – (r), B – (q), C – (p)

Answer: A – (r), B – (p), C – (q)

Question:

• a) A – (r) , B – (p), C – (s), D – (t), E– (q)
• b) A – (p) , B – (r), C – (s), D – (t), E– (q)
• c) A – (r) , B – (s), C – (p), D – (t), E– (q)
• d) A – (r) , B – (s), C – (p), D – (t), E– (q)

Answer: A – (r) , B – (p), C – (s), D – (t), E– (q)

Question:

• a) A – (t), B – (s), C – (p), D – (q)
• b) A – (s), B – (q), C – (p), D – (r)
• c) A – (p), B – (q), C – (r), D – (s)
• d) A – (r), B – (t), C – (p), D – (q)

Answer: A – (t), B – (s), C – (p), D – (q)

Question:

• a) Assertion is correct, reason is incorrect
• b) Assertion is incorrect, reason is correct
• c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is incorrect

Question:

• a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
• b) Assertion is correct, reason is incorrect
• c) Assertion is incorrect, reason is correct
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:

• a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
• b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• c) Assertion is correct, reason is incorrect
• d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:  A co-ordination complex compound of cobalt has the 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 AgNO₃ solution, we get two moles of AgCl precipitate. The ionic formula for this complex would be

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a) 4, 6, 6
• b) 2, 4, 6
• c) 6, 4, 4
• d) 4, 4, 6

Answer: 4, 6, 6

Question:

• a) CN^– is coordinating to the cobalt as the ligand
• b) CN^– hydrolysis immediately
• c) CN^– forms covalent bond
• d) All of these

Answer: CN^– is coordinating to the cobalt as the ligand

Question: Suppose someone made aqueous solution of NiCl₂ and recrystallized its aqueous solution in excess of water and if two moles of precipitate AgCl was formed on treatment with AgNO₃, what is the most probable structure of the compound ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Total number of electron count in Ni(CO)₄ and Fe(CO)₅ respectively are

• a) 36, 36
• b) 36, 34
• c) 34, 36
• d) 34, 34

Answer: 36, 36

Question: The formula for the complex, dichlorobis (urea) copper (II) is

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: According to IUPAC nomenclature sodium nitroprusside is named as

• a) Sodium pentacyanonitrosylferrate (III)
• b) Sodium nitroferrocyanide
• c) Sodium nitroferricyanide
• d) Sodium pentacyanonitrosylferrate (II)

Answer: Sodium pentacyanonitrosylferrate (III)

Question:

• a) 4
• b) 6
• c) 3
• d) 5

Answer: 4

Question:  Which of the following will give a pair of enantiomorphs?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a) geometrical isomerism
• b) ionization isomerism
• c) linkage isomerism
• d) coordination isomerism

Answer: geometrical isomerism

Question: Which of the following has an optical isomer

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Among the following complexes, optical activity is possible in

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) linkage isomerism, ionization isomerism and geometrical isomerism
• b) ionization isomerism, geometrical isomerism and optical isomerism
• c) linkage isomerism, geometrical isomerism and optical isomerism
• d) linkage isomerism, ionization isomerism and optical isomerism

Answer: linkage isomerism, ionization isomerism and geometrical isomerism

Question: Which of the following compounds exhibits linkage isomerism

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) (ii) only
• b) (ii) and (iv)
• c) (i) and (ii)
• d) (i) and (iii)

Answer: (ii) only

Question:

• a) (i) and (iii)
• b) (iii) and (iv)
• c) (ii) and (iii)
• d) (i), (iii) and (iv)

Answer: (i) and (iii)

Question: For which value of the x, and y, the following square planar compound shows geometrical isomers [Pt (Cl)_x (Br)_y]^2–

• a) 3, 1
• b) 1, 1
• c) 1, 3
• d) 2, 2

Answer: 3, 1

Question: How many geometrical isomers are possible for following square planar compound [M (Cl) (Br) (I) (F)] (where M is a metal ion)

• a) 3
• b) 8
• c) 2
• d) 9

Answer: 3

Question: The terahedral complex [M(A)(B)(X)(Y)], where A,B,X and Y are different ligands and M is a metal ion is

• a) rotate plane polarized light
• b) incomplete information
• c) can’t be said
• d) optically inactive

Answer: rotate plane polarized light

Question:

• a) (i), (ii) and (iii)
• b) (i) and (ii)
• c) (i) and (iv)
• d) (ii) only

Answer: (i), (ii) and (iii)

Question: The correct statement with respect to the complexes Ni(CO)₄ and [Ni(CN)₄]^2– is

• a) have tetrahedral and square planar geometry respectively
• b) both have square planar geometry
• c) both have tetrahedral geometry
• d) nickel is in the same oxidation state in both

Answer: have tetrahedral and square planar geometry respectively

Question: Which one of the following complexes is an outer orbital complex ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Both [Ni(CO)₄] and [Ni(CN)₄]^2– are diamagnetic. The hybridisations of nickel in these complexes, respectively, are

• a) sp³, dsp²
• b) dsp², sp²
• c) sp³, sp³
• d) dsp², sp³

Answer: sp³, dsp²

Question: Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? (Atomic number: Zn = 30, Cr = 24, Co = 27, Ni = 28)

• a)

  

• b)

  

• c) Both
• d) None of these

Answer:

Question: The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: According to valence bond theory which of the following statement is correct about the complexes Ni(CO)₄ and [Ni(CN)₄]^2– if both are diamagnetic in nature

• a) one is tetrahedral and other is square planar
• b) one is square planar and other is tetrahedral
• c) both are square planar
• d) both are tetrahedral

Answer: one is tetrahedral and other is square planar

Question:

• a) Both
• b) Magnetic moment is 4.8 and 2.8
• c) inner sphere and outer sphere complexes
• d) None of these

Answer: Both

Question:

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:  Which of the following complex ions is expected to absorb visible light?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Crystal field stabilization energy for high spin d 4 octahedral complex is

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Low spin complex of d⁶-cation in an octahedral field will have the following energy :

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following carbonyls will have the strongest C – O bond ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) (i) and (iii)
• b) (ii) and (iv)
• c) (i) and (ii)
• d) (iii) and (iv)

Answer:  (i) and (iii)