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CBSE

Subject

Chemistry

NEET Chemistry : Redox Reactions

Multiple Choice Questions

11.

In an oxidation-reduction reaction, MnO $_{4}^{-}$ ion is converted to Mn²⁺. What is the number of equivalents of KMnO₄ (mol. wt.= 158) present in 250 mL of 0.04 M KMnO₄ solution ?

0.02
0.05
0.04
0.07

12.

In acidic medium, dichromatic ion oxidises ferrous ion to ferric ion. If the gram molecular weight of potassium dichromate is 294 g its gram equivalent weight (in grams) is

24.5
49
125
250

13.

For the reaction,

NH₃ + OCl^- $\to$ N₂H₄ + Cl^-

occurring in basic medium, the coefficient of N₂H₄ in the balanced equation will be

14.

Point out the correct statement.

Below 710 $°$ C, C is better reducing agent than CO
Below 710°C, CO is better reducing agent than C
Below 710 $°$ C, CO is an oxidising agent
Below 710 $°$ C, CO, is a reducing agent

15.

Which of the following is wrong statement?

Ni(CO)₄ has oxidation number +4 for Ni
Ni(CO)₄ has zero oxidation number for Ni
Ni is metal
CO is gas

16.

KMnO₄ reacts with ferrous sulphate according to the following equation,

Mn $O_{4}^{-}$ + 5Fe²⁺ + 8H^- $\to$ Mn²⁺ + 2Fe³⁺ + 4H₂O

Here, 10 mL of 0.1M KMnO₄ is equivalent to

50 mL of 0.1 M FesO₄
20 mL of 0.1 M FesO₄
40 mL of 0.1 M FesO₄
30 mL of 0.1 M FeSO₄

17.

The maximum oxidation state exhibited by actinide ions is

18.

Oxidation state of oxygen in F₂O is

+1
-1
+2
-2

19.

Which of the following species do not show disproportionation on reaction?

ClO^-, Cl $O_{2}^{-}$ , Cl $O_{3}^{-}$ and Cl $O_{4}^{-}$

Cl $O_{4}^{-}$
Cl $O_{4}^{-}$
ClO^-
None of these

20.

Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenyl amine as indicator. The number of moles of Mohr's Salt required per mole of dichromate is:

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