Question

Identify the compound X on the basis of the reactions given below.
Also, write the name and chemical formulae ofA, B and C.
+ Zn--> A + H2(g)
X + HCl ----> B + H2O
+ CH3COOH------------> C + H2O
Can answer be KOH???

Answer 1

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answer 2)))))
Since in first reaction there is liberation of hydrogen gas on reaction with X. Metals liberate htdrogen gas on reaction with bases. Also in second reaction X react with acid to form water and B. Since acid react with base. So, X is a base. Most common base is Sodium hydroxide.
The compound X is sodium hydroxide.
1. Reaction:
NaOH + Zn → Na2ZnO2 + H2

Hence, compound A is sodium zincate Na2ZnO2

2. Reaction:
NaOH + HCl → NaCl + H2O

Hence, compound B is sodium chloride NaCl

3. Reaction 
NaOH + CH3COOH → CH3COONa + H2O

Hence, compound C is sodium acetate.