Embibe Experts Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: assam board-2018

${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_2{\mathrm{O}}_3+2\mathrm{Fe}$

The above reaction is an example of a 

Translate the following statement into a chemical equation and then balance it. 

Hydrogen gas combines with nitrogen to form ammonia.

Translate the following statement into a chemical equation and then balance it. 

Hydrogen sulphide gas burns in the air to give water and sulphur dioxide. 

What does one mean by exothermic and endothermic reactions? Give examples. 

Oil and fat containing food items are flushed with nitrogen. Why? 

What would you observe when zinc is added to a solution of iron($\mathrm{II}$) sulphate? Write the chemical reaction that takes place. 

Translate the following statement into chemical equation and then balance them. 

Hydrogen sulphide gas burns in air to give water and sulphur dioxide. 

Translate the following statement into chemical equation and then balance them. 

Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.