Q.

Which of the following are neutral substances?


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a

Ammonium hydroxide

b

Ammonium chloride

c

Sodium hydroxide

d

Hydrochloric acid 

answer is B.

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Detailed Solution

Concept- Substances can be classified as acidic, basic and neutral on the basis of their chemical properties.Acidic substances release hydrogen ions (H+) in their solution, basic substances release hydroxide ions (OH-) in their solution and neutral substances has equal number of hydrogen ions and hydroxide ions.
Now, pH scale is a scale that tells whether a substance is acidic, basic or neutral and it ranges from 0-14. pH 7 means the solution is neutral, pH less than 7 means the solution is acidic and pH more than 7 means the solution is basic.
Now, from the given options, ammonium hydroxide (NH4OH) and sodium hydroxide (NaOH) are capable to release hydroxide ions (OH-) in their solution, thus they are basic compounds.
Hydrochloric acid (HCl) is acidic in nature.
Thus, ammonium chloride (NH4Cl) is salt which is a neutral substance.
Hence, the correct answer is 2.
 
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