Embibe Experts Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Exercise

Which of these is not a characteristic of chemical reaction?

What causes browning of the exposed cut surface of a brinjal? 

What is Tarnishing? Give an example.

Why is a combustion reaction an oxidation reaction?

Balance the following chemical equations and identify the type of chemical reaction.
${\mathrm{TiCl}}_4\left(\mathrm{l}\right)+\mathrm{Mg}\left(\mathrm{s}\right)\to \mathrm{Ti}\left(\mathrm{s}\right)+{\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

A blue coloured salt becomes white on heating.Give reason.

An aluminium vessel is used to store ferrous sulphate solution. It is observed that in few days holes appear in the vessel. Explain the observation and give the chemical equation in support of your answer.

A brown substance 'X' on heating in the air forms a substance 'Y'. When hydrogen gas is passed over heated 'Y', it again changes into 'X'.
Name the type of chemical reactions occurring during both the changes.