Give an example of a double displacement reaction?

Important Questions on Chemical Reactions and Equations

HARD

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>QUESTIONS>Q 3

Identify the substances that are oxidized and the substances that are reduced in the following reaction:
$4\mathrm{N}\mathrm{a}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{N}\mathrm{a}}_2\mathrm{O}\left(\mathrm{s}\right)$

HARD

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>QUESTIONS>Q 3

Identify the substances that are oxidized and the substances that are reduced in the following reaction:
$\mathrm{C}\mathrm{u}\mathrm{O}\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)\to \mathrm{C}\mathrm{u}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 1

Which of the statements about the reaction below are incorrect?
$2\mathrm{P}\mathrm{b}\mathrm{O}\left(\mathrm{s}\right)+\mathrm{C}\left(\mathrm{s}\right)\to 2\mathrm{P}\mathrm{b}\left(\mathrm{s}\right)+\mathrm{C}{\mathrm{O}}_2\left(\mathrm{g}\right)$
$\left(\mathrm{i}\right)$ Lead is getting reduced.
$\left(\mathrm{i}\mathrm{i}\right)$ Carbon dioxide is getting oxidised.
$\left(\mathrm{i}\mathrm{i}\mathrm{i}\right)$ Carbon is getting oxidised.
$\left(\mathrm{i}\mathrm{v}\right)$ Lead oxide is getting reduced.

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 2

${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{3}}+2\mathrm{Fe}$
The above reaction is an example of a:

EASY

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 3

What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer.

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 4

What is a balanced chemical equation? Why should chemical equations be balanced?

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 5

Translate the following statement into chemical equation and then balance it:
Hydrogen gas combines with nitrogen to form ammonia.

MEDIUM

10th Mizoram Board

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS X>Chapter 1 - Chemical Reactions and Equations>EXERCISES>Q 5

Translate the following statement into chemical equation and then balance it:
Hydrogen sulphide gas burns in air to give water and sulphur dioxide.