Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 3

HARD

10th CBSE

IMPORTANT

Earn 100

On heating blue-coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X are formed

(a) Write a balanced chemical equation of the reaction.

(b) Identify the brown gas X evolved.

(c) Identify the type of reaction

(d) What could be the pH range of aqueous solution of the gas X?

Important Questions on Chemical Reactions and Equations

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 3

Give the characteristic test for the following gases.

(a) ${CO}_{2}$

(b) ${SO}_{2}$

(c) $O_{2}$

(d) $H_{2}$

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4

Identify the oxidising agent (oxidant) in the following reaction.

{Pb}_{3} O_{4} + 8 HCl \to 3 {PbCl}_{2} + {Cl}_{2} + 4 H_{2} O

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4

Identify the oxidising agent (oxidant) in the following reactions.

2 Mg + O_{2} \to 2 MgO

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4

Identify the oxidising agent (oxidant) in the following reactions.

{CuSO}_{4} + Zn \to Cu + {ZnSO}_{4}

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4

Identify the oxidising agent (oxidant) in the following reactions.

V_{2} O_{5} + 5 Ca \to 2 V + 5 CaO

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4

Identify the oxidising agent (oxidant) in the following reactions.

3 Fe + 4 H_{2} O \to {Fe}_{3} O_{4} + 4 H_{2}

EASY

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 5

During the reaction of some metals with dilute hydrochloric acid, following observations were made.
(a) Silver metal does not show any change
(b) The temperature of the reaction mixture rises when aluminum (Al) is added.
(C) The reaction of sodium metal is found to be highly explosive
(d) Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.
Explain these observations giving suitable reasons.

HARD

10th CBSE

IMPORTANT

Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 5

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not.