White silver chloride turns to grey in sunlight because of the formation of silver metal along with the evolution of chlorine gas. Identify the chemical equation that gives a correct representation of the process.

The balanced chemical equation for the reaction of nitrogen with hydrogen to produce ammonia gas is

Which of the following reactions is a combination reaction?

The following reaction is used for the preparation of oxygen gas in the laboratory: 

$2{\mathrm{KClO}}_3\left(\mathrm{s}\right)\underset{\mathrm{Catalyst}}{\overset{\mathrm{Heat}}{\to }}2\mathrm{KCl}\left(\mathrm{s}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)$

Which of the following statement(s) is (are) correct about the reaction? 

Identify the chemical equation that correctly represents the production of magnesium nitride by burning magnesium metal in a pure nitrogen atmosphere from the following: 

Complete the following statements by choosing the correct type of reaction for X and Y. 

Statement 1: The heating of lead nitrate is an example of 'X" reaction. 

Statement 2: The burning of magnesium is an example of 'Y reaction. 

The following observation help(s) us to determine that a chemical change has taken place: