Coordination Compounds(11th And 12th > Chemistry ) Questions and answers for exam Preparation

The solution of the complex tetraamminecopper (II) sulphate in water

Will give the tests of $C u^{2 +}$ ions
Will give the tests of $N H_{3}$
Will give the tests of $S O_{4}^{- 2}$ ions
Will not give any test of the above species

Explanation:-

Answer: Option C. -> Will give the tests of

S O_{4}^{- 2}

ions
:
C

[C u (N H_{3})_{4}] S O_{4} \to [C u (N H_{3})_{4}]^{2 +} + S O_{4}^{- 2}

It will give test for

S O_{4}^{- 2}

Question 2.

Which of the following is not correct?
Organometallics can play an ever expanding role in the production of

Pharmaceuticals
Agrochemicals
Flavours
None of these

Explanation:-

Answer: Option D. -> None of these
:
D
Organometallics are used to make all of these.

Question 3.

Which of the following is a mixed salt?

$C a O C l_{2}$
$C u S O_{4} .4 N H_{3}$
$A g C l .2 N H_{3}$
$P t C l_{4} .5 N H_{3}$

Explanation:-

Answer: Option A. ->

C a O C l_{2}

:
A
Mixed salt contains two different types of cations or anions. It has

C a 2 +

, it also contains two anions

C l^{-}

and

O C l^{-}

.

Question 4.

The ion which is not tetrahedral in shape is?

$B F_{4}^{-}$
$N H_{4}^{+}$
$[C u (N H_{3})_{4}]^{2 +}$
$N i C l_{4}^{2 -}$

Explanation:-

Answer: Option C. ->

[C u (N H_{3})_{4}]^{2 +}

:
C

[C u (N H_{3})_{4}]^{2 +}

is square planar
Hybridazation state of

C u^{+ 2}

is

d s p^{2}

Question 5.

Which of the following metal ion is present in Ziegler-Natta catalyst?

$F e^{2 +}$
$Z r^{4 +}$
$R h^{+ 1}$
$T i^{4 +}$

Explanation:-

Answer: Option D. ->

T i^{4 +}

:
D
This catalyst is made up of

T i C l_{3} + A l (C_{2} H_{5})_{2} C l

Question 6.

In which of the following complexes, nickel is in the highest oxidation state?

$K_{4} [N i (C N)_{4}]$
$[K_{2} N i F_{6}]$
$[N i (C O)_{4}]$
$[N i (C N)_{4}]^{2 -}$

Explanation:-

Answer: Option B. ->

[K_{2} N i F_{6}]

:
B
Nickel has + 4 oxidation state.

Question 7.

The metal ion present in Zeise's salt is

Magnesium
Iron
Platinum
Palladium

Explanation:-

Answer: Option C. -> Platinum
:
C
Zeise’s salt is

K [P t C l_{3} (C_{2} H_{4})]

Question 8.

In the complex $F e (C O)_{x}$ , the value of x is

3
4
5
6

Explanation:-

Answer: Option C. -> 5
:
C
EAN = 36 so, 26 + 2

\times

n = 36
n = 5

Question 9.

In a complex, the highest co-ordination number is

6
12
4
8

Explanation:-

Answer: Option A. -> 6
:
A
According to Werner theory

Question 10.

Which of the following statement is incorrect ?

Co-ordination compounds and complexes are synonymous terms.
Complexes always give ions in solution.
Complexes may or may not give ions in solution
Complex ion does not dissociate into its compones even in solution.

Explanation:-

Answer: Option B. -> Complexes always give ions in solution.
:
B
You can have complexes that do not form ions in solution.
e.g.

[F e (C O)_{5}]