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Question

Ammonia is a compound. Which property amongst the properties of ammonia given below is incorrect?


A

It has a uniform composition

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B

The constituents of ammonia do not retain their individual properties

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C

The constituents of ammonia can be separated by physical means

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D

The constituents of ammonia are combined together chemically

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Solution

The correct option is C

The constituents of ammonia can be separated by physical means


Explanation for the correct option:
(C) The constituents of ammonia can be separated by physical means

  • Ammonia is a compound of Nitrogen and Hydrogen. It can be separated by chemical method but it cannot be separated by physical means.

Explanation for the incorrect options:

(A) It has a uniform composition

  • Ammonia NH3 is a chemical compound composed of one nitrogen atom and three hydrogen atoms.
  • The composition of ammonia, nitrogen, and hydrogen is always present in the ratio of 14:3 by mass.

(B) The constituents of ammonia do not retain their individual properties

  • The formation of ammonia is a chemical change where Nitrogen is chemically reacting with Hydrogen which produces Ammonia with different properties.
  • They do not retain their properties since it is a chemical change.

(D) The constituents of ammonia are combined together chemically

  • Ammonia is formed by the chemical reaction between Nitrogen and Hydrogen.
    N2g+3H2g2NH3g

Hence option (C) is correct.


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