Balance the following equation: Fe + H 2 O → Fe 3 O 4 + H 2

The balanced equation is as follows: 3 Fe + 4 H 2 O → Fe 3 O 4 + 4 H 2 When iron reacts with oxygen and water, iron oxide is formed. This iron oxide is commonly known as rust and the process is known as rusting.

Balance the following equation: CuS + HCl → CuCl 2 + H 2 S

The balanced chemical equation is as follows: CuS s + 2 HCl aq → CuCl 2 aq + H 2 S g When copper sulphide reacts with hydrochloric acid, copper chloride will form and hydrogen sulphide gas will be evolved.

Balance the following equation: CuS + HCl → CuCl 2 + H 2 S

The balanced chemical equation is as follows: CuS s + 2 HCl aq → CuCl 2 aq + H 2 S g When copper sulphide reacts with hydrochloric acid, copper chloride will form and hydrogen sulphide gas will be evolved.

Balance the following equation: Fe + H 2 O → Fe 3 O 4 + H 2

The balanced equation is as follows: 3 Fe + 4 H 2 O → Fe 3 O 4 + 4 H 2 When iron reacts with oxygen and water, iron oxide is formed. This iron oxide is commonly known as rust and the process is known as rusting.

Ferrous sulphate decomposes with the evolution of gas having characteristics odour of burning sulphur. Identify the type of reaction.

Ferrous sulphate decomposes with the evolution of gas having characteristics odour of burning sulphur the type of this reaction is the thermal decomposition reaction. 2 FeSO 4 → ∆ Fe 2 O 3 + SO 2 + SO 3 On heating, anhydrous ferrous sulphate decomposes to form ferric oxide.

Which one of the following processes involves a chemical reaction?

Heating copper wire in presence of air at high temperature

Storing of oxygen gas under pressure in a gas cylinder

Keeping petrol in a china dish in the open

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 15

MEDIUM

10th Meghalaya Board

IMPORTANT

Earn 100

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide. What type of reaction is this?

Important Questions on Chemical Reactions and Equations

MEDIUM

10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 16

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide. What is the colour of copper sulphate solution?

MEDIUM

10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 17

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide. Write a balanced chemical equation to represent the above reaction.

MEDIUM

10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 18

Name the reaction that is commonly used in the conversion of ethanol to ethanoic acid.

MEDIUM

10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 19

What happens chemically, when quicklime is added to water? Give the chemical reaction.

MEDIUM

10th Meghalaya Board