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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