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

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IMPORTANT

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

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:

C u O (s) + H_{2} (g) \to C u (s) + H_{2} O (l)

MEDIUM

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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 P b O (s) + C (s) \to 2 P b (s) + C O_{2} (g)

(i)

Lead is getting reduced.

(i i)

Carbon dioxide is getting oxidised.

(i i i)

Carbon is getting oxidised.

(i v)

Lead oxide is getting reduced.

MEDIUM

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IMPORTANT

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

{Fe}_{2} O_{3} + 2 Al \to {Al}_{2} O_{3} + 2 Fe

The above reaction is an example of a:

EASY

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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

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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.

HARD

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:
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.