1) ………………. among the following contain partially filled d – subshell and does not show variable oxidation states.

a) Zn
b) cd
c) La
d) Hg

ANSWER : La

2) Which one is of the following is the lightest transition element?

a) Ti
b) Sc
c) Fe
d) Hg

ANSWER : Sc

3) …………….. has the maximum number of unpaired electrons.

a) Fe²⁺

b) Fe³⁺

c) Co³⁺

d) Co²⁺

ANSWER : Fe³⁺

4) The lowest degree of paramagnetism per mole of the compound at 298 K will be shown by:

a) CuSO₄.5H₂O

b) FeSO₄.6H₂O

c) NiSO₄.6H₂O

d) MnSO₄.4H₂O

ANSWER : CuSO₄.5H₂O

5) What is the equivalent weight of KMnO₄ when it is converted in MnSO₄?

a) M/6
b) M/2
c) M/5
d) M/3

ANSWER : M/5

6) In the complex [Fe(H₂O) ₅ (NO) ⁺]SO₄. The oxidation state of iron is:

a) +2
b) 0
c) +3
d) +1

ANSWER : +1

7) Which of the following statement is correct?

a) Zinc reacts with conc. HNO₃ to produce of mixture of NO and NO₂.
b) Zinc reacts with dil. HNO₃ to produce N₂.
c) Zinc reacts with very dil. HNO₃ to produce NH₄NO₃
d) Zinc reacts with dil. HNO₃ to produce NO₂.

ANSWER : Zinc reacts with very dil. HNO₃ to produce NH₄NO₃

8) Which among the following is present in Gun-metal?

a) Cu
b) Zn
c) Sn
d) All of these.

ANSWER : All of these.

9) The cyanide complex used for the extraction of Gold is:

a) [Au (CN)] ^-
b) [Au (CN) ₂] ^-
c) [Au (CN) ₃] ^-
d) [Au (CN) ₄] ^-

ANSWER : [Au (CN) ₂] ^-

10) Formation of …………. takes place when Zn dissolves in an excess of NaOH.

a) Zn (OH) ₂
b) Zn O
c) Na Zn (OH) ₃
d) Na₂ZnO₂

ANSWER : Na₂ZnO₂ 

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