Balance the following chemical reaction. (i) Mg + N 2 → Mg 3 N 2

The balanced chemical reaction is as follows: 3 Mg + N 2 → Mg 3 N 2 In this reaction, oxidation of Mg and reduction of nitrogen is taken place. This represents a redox reaction. Magnesium is oxidized, and dinitrogen is reduced.

Balance the following chemical reaction. C 2 H 6 + O 2 → CO 2 + H 2 O

The balanced chemical reaction is as follows: 2 C 2 H 6 + 7 O 2 → 4 CO 2 + 6 H 2 O Here two moles of ethane reacts with seven moles of oxygen to release four moles of carbon dioxide. This is a combustion reaction in which any substance reacts with oxygen in the presence of air to release carbon dioxide and heat energy.

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.

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

When quicklime is added to water, it forms slaked lime along with the evolution of heat. There will be a rise in the temperature of the bucket. Calcium oxide reacts with water to form calcium hydroxide, also called slaked lime. The chemical equation is as follows: CaO + H 2 O → Ca OH 2

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

The reaction that is commonly used in the conversion of ethanol to ethanoic acid is the oxidation reaction. Here oxidising agents like KMnO 4 or acidified K 2 Cr 2 O 7 are used in the conversion of ethanol to ethanoic acid.

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.

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide. The balanced chemical equation of the reaction is as follows: 2 NaOH + CuSO 4 → Na 2 SO 4 + Cu OH 2 ↓ It is a double displacement type of reaction. These reactions generally occur in aqueous solutions in which the ions precipitate and there is an exchange of ions.

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?

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide. The original colour of the copper sulphate solution is blue. In this reaction pale blue precipitate of copper hydroxide is formed.

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?

When an aqueous sodium hydroxide solution is added to the aqueous copper sulphate solution, it forms a bluish-white precipitate of copper hydroxide double displacement reaction takes place. Double displacement reactions generally occur in aqueous solutions in which the ions precipitate and there is an exchange of ions.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2018>Q 5

MEDIUM

10th Meghalaya Board

IMPORTANT

Earn 100

What is decomposition reaction? Give an example.

Important Questions on Chemical Reactions and Equations

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 6

The gas with which snacks are packed in aluminium bags is flushed before packing is _____.

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 7

Balance the following chemical reaction.

(i) $Mg + N_{2} \to {Mg}_{3} N_{2}$

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 8

Balance the following chemical reaction.

$C_{2} H_{6} + O_{2} \to {CO}_{2} + H_{2} O$

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 9

What is observed when a solution of potassium iodide is added to a solution of lead nitrate in a test tube?

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 10

When a solution of potassium iodide is added to a solution of lead nitrate in a test tube. What type of reaction is this?

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2019>Q 11

Write a balanced chemical equation to represent the reaction when a solution of potassium iodide is added to a solution of lead nitrate in a test tube?

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 12

Which one of the following processes involves a chemical reaction?

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10th Meghalaya Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 1 - Chemical Reactions and Equations>meghalaya-2020>Q 14

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