Question

Complete the following equation
 $ ZnS{O_4} + N{H_4}OH $
A. $ ZnS{O_4} + 3N{H_4}OH \to 2{(N{H_4})_2}S{O_4} + Zn{(OH)_2} \downarrow $
B. $ ZnS{O_4} + 2N{H_4}OH \to 2{(N{H_4})_2}S{O_4} + Zn{(OH)_3} \downarrow $
C. $ ZnS{O_4} + 3N{H_4}OH \to {(N{H_4})_2}S{O_4} + Zn{(OH)_3} \downarrow $
D. $ ZnS{O_4} + 2N{H_4}OH \to {(N{H_4})_2}S{O_4} + Zn{(OH)_2} \downarrow $

Answer 1

Hint: A chemical reaction in which one reactant breaks down into two or more products is known as a decomposition reaction. A double decomposition reaction occurs when two constituent reactants exchange positive and negative ions to generate two new compounds.

Complete answer:
Zinc sulphate reacts with ammonium hydroxide to give ammonium sulphate and zinc hydroxide. White gelatinous precipitate of zinc hydroxide is formed.
The reaction takes place as follows:
 $ ZnS{O_4} + 2N{H_4}OH \to {(N{H_4})_2}S{O_4} + Zn{(OH)_2} \downarrow $
In this reaction, ions of sulphate and ammonia are exchanged. Hence, it is a double decomposition reaction.
Hence, the correct option is D. $ ZnS{O_4} + 2N{H_4}OH \to {(N{H_4})_2}S{O_4} + Zn{(OH)_2} \downarrow $
Additional Information: The three primary types of decomposition reactions are:
Thermal Decomposition reaction: A decomposition reaction that is activated by thermal energy is known as a thermal decomposition reaction.
Electrolytic Decomposition Reaction: The activation energy for decomposition in an electrolytic decomposition reaction is delivered in the form of electrical energy.
Photo Decomposition Reaction: A photodecomposition reaction is a sort of decomposition reaction in which the reaction absorbs energy from photons and breaks down into its parts.
Applications of Decomposition Reactions:
Cement or calcium oxide production.
Extraction of metals from oxides, chlorides, and other metallurgical processes
Acid indigestion is relieved.
Welding with thermite.

Note:
A solution of ammonia in water has the chemical formula $ N{H_4}OH $ . Ammonia water, ammonium hydroxide, ammonia liquor, and aqueous ammonia are all names for the same solution. The symbol $ N{H_3}(aq) $ is frequently used to represent $ N{H_4}OH $ .Ammonium Hydroxide is exceedingly harmful if it comes into contact with the skin and when it comes into contact with the eyes .