Embibe Experts Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Uttarakhand Board-2020

Give an example of displacement reaction.

Identify the substance that is oxidised and reduced in the following reaction-

${\mathrm{MnO}}_2 + 4\mathrm{HCl} \stackrel{ }{\to } {\mathrm{MnCl}}_2 + 2{\mathrm{H}}_2\mathrm{O} + {\mathrm{Cl}}_2$

What do you mean by Redox reaction ? Identify the substances that are oxidised and reduced in the following reaction- 

$\mathrm{ZnO} + \mathrm{C} \stackrel{ }{\to } \mathrm{Zn} + \mathrm{CO}$

What is 'Combination Reaction'? Give an example also.

Give balanced chemical equation for following reaction-

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

What happens when Mercuric Oxide is heated.(write only chemical equation)

What happens when Iron Oxide(III) reacts with Aluminium.(write only chemical equation)

Write the definition of exothermic and endothermic reactions. Give an example of both.