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Question: Assertion: \( Zn{{\left( OH \right)}_{2}} \) is dissolved in both \( N{{H}_{4}}OH \) and \( NaOH \) ...

Assertion: Zn(OH)2Zn{{\left( OH \right)}_{2}} is dissolved in both NH4OHN{{H}_{4}}OH and NaOHNaOH solution.
Reason: Both NH4OHN{{H}_{4}}OH and NaOHNaOH being basic can dissolve amphoteric Zn(OH)2.Zn{{\left( OH \right)}_{2}}.
(A) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
(B) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
(C) Assertion is correct but Reason is incorrect.
(D) Assertion is incorrect but Reason is correct.

Explanation

Solution

We know that the ammonium hydroxide is a volatile colorless solution with a pungent odor. It is also called ammonia in water. Ammonia water generally will dissolve Group one that is alkali metals of the modern periodic table and other electropositive metals.

Complete answer:
As we know , sodium hydroxide is the strongest base because it completely dissociates to form sodium ions and hydroxide ions. These hydroxide ions are treated with hydrogen ions further from the acid and completely ionize the hydrogen ions. Ammonium hydroxide is generally an ammonia solution of water. Normally referred to as ammonia or ammonia gas, this compound is useful as a cleaner and also in the manufacturing of plastics, rubber, fertilizers and textiles. It does not have any colour, white liquid having a pung-to-faint ammonia smell.
It is the main component in drain and oven cleaners. It is actually used in chemical manufacturing, oil refining, hydraulic fracturing, water treatment and metal processing. It is also useful in the manufacture of fabric, plastic wrap, paper and soap. Concentrated sodium hydroxide is a very harmful chemical and can create very serious tissue burns in humans; if it is splashed in the eyes by accident, it could create permanent blindness and many severe damages. When it is actually applied to plants, the sodium hydroxide could also damage their tissues and more than likely kill them as well.
Zinc hydroxide is insoluble in water. But when excess hydroxide ions are added, water soluble zincate ions are formed. Zn(OH)2+2OH→Zn(OH)42−Zn{{\left( OH \right)}_{2}}+2OH\to Zn\left( OH \right)_{4}^{2-} these hydroxides can be supplied by NaOHNaOH as well as ammonium hydroxide ion. Thus, Zn(OH)2Zn{{\left( OH \right)}_{2}} ​ is dissolved in both NH4OHN{{H}_{4}}OH and NaOHNaOH solution. Thus, assertion is correct but Reason is incorrect.
Therefore, the correct answer is option C.

Note:
Remember that the main reason why copper hydroxide and aluminium hydroxide is insoluble in ammonium hydroxide. As they are inorganic compounds. Ammonium hydroxide is a colorless substance with a highly volatile nature and pungent odor. Dilute solution of ammonia in water is used as a common household cleaning agent.