Question

The reaction between ammonium chloride and sodium hydroxide evolves a choking colourless gas that changes red litmus paper blue and the reaction vessels feels cool at the end of the reaction.

i. Write a balanced chemical equation between ammonium chloride and sodium hydroxide.

ii. What is the name of the gas evolved

iii.is the reaction exothermic or endothermic.

iv. Explain your choice in (iii) above.