Q. 235.0( 7 Votes )

Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formula of A, B and C.

Answer :

The X must be sodium hydroxide (NaOH) because of the following reactions:

i. When NaOH reacts with zinc (a metal), it gives sodium zincate (a salt) and hydrogen gas:

ii. When sodium hydroxide (a base) and HCl (an acid) reacts together, they form a common salt (NaCl) and water:

NaOH + HCl NaCl + H2O

Note: The above reaction is a neutralization reaction. The reaction

between an acid and a base to give a salt and water is called neutralization reaction.

Base + Acid Salt + Water

iii. When NaOH and CH3COOH (an acid) reacts together, they form a salt of sodium acetate and water:

The above reaction is also an example of neutralization reaction.

Thus, X is NaOH.

A is sodium zincate (Na2ZnO2)

B is common salt (NaCl)

C is sodium acetate (CH3COONa)

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