Chemical Reactions

When chlorine reacts with cold and dilute sodium hydroxide ( ) solution, the following products are formed:

Sodium Hypochlorite (NaOCl): Chlorine ( ) reacts with sodium hydroxide ( ) to produce sodium hypochlorite ( ) as one of the primary products. The balanced chemical equation for this reaction is:

Sodium Chloride (NaCl): In addition to sodium hypochlorite, sodium chloride ( ) is also formed as a product. The balanced chemical equation shows the formation of sodium chloride:

Water (H₂O): Water is produced as a byproduct of the reaction. The balanced chemical equation includes water as one of the products:

So, when chlorine reacts with a cold and dilute sodium hydroxide solution, the products formed are sodium hypochlorite ( ), sodium chloride ( ), and water ( ).

Zinc is an amphoteric metal, meaning it reacts with both acids and bases. When zinc reacts with a strong base like sodium hydroxide (NaOH), it dissolves, forming sodium zincate ( ) and hydrogen gas ( ).

The reaction proceeds as:

This shows that sodium zincate and hydrogen gas are the products of the reaction.

Zinc initially reacts with hydroxide ions ( ) from sodium hydroxide. This forms a complex ion in aqueous solution.

The sodium ions ( ) associate with the zincate ion to form sodium zincate .

Simultaneously, hydrogen gas ( ) is released.

Among the given options, only option (2) correctly represents the formation of sodium zincate ( ) along with hydrogen gas ( ), making it the right choice.

Quick tip: Zinc’s amphoteric nature allows it to react with both acids and bases to form different products, like zincate when reacting with bases.