Assertion (A): Ammonia is a compound.
Reason (R): Ammonia is formed by the chemical combination of two elements which are nitrogen and hydrogen.

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Solution

The correct answer is option (a).

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Q. Assertion :Ammonia is a compound. Reason: Ammonia (

N H_{3}

) consists of molecules of two different elements, nitrogen and hydrogen, bonded together.

Combination of nitrogen and hydrogen under suitable conditions to form ammonia is a reversible reaction. It is a physical change or a chemical change? Give reasons.

Q. Assertion: Nitrogen and hydrogen combine together to form ammonia.
Reason: It is an exothermic reaction.

Q. In the formation of ammonia we write the chemical equation is NITROGEN COMBINE WITH HYDROGEN TO FORM AMMONIA ,
NITROGEN + HYDROGEN - AMMONIA After writing the nitrogen and hydrogen we put reversable sign what that sign mean is it a chemical or physical change?

Assertion: Nitrogen and hydrogen combine together to form ammonia and heat.
Reason: It is an exothermic reaction.

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Assertion (A): Ammonia is a compound. ​ Reason (R): Ammonia is formed by the chemical combination of two elements which are nitrogen and hydrogen.​

The correct answer is option (a).

Assertion (A): Ammonia is a compound.
Reason (R): Ammonia is formed by the chemical combination of two elements which are nitrogen and hydrogen.