Question

Given below are two statements:

Statement (I): The process in which the ammonia is converted into nitrites and then further into nitrates is called denitrification.

Statement (II): Nitrate is usually the predominant form of available nitrogen that is absorbed.

In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Remember the correct name for ammonia to nitrate conversion, and which nitrogen form plants absorb most.

Answer 1

The Correct Option is D

Step 1: Conversion of ammonia to nitrite and then to nitrate is called nitrification, not denitrification. Denitrification is the reverse process where nitrate is reduced to gaseous nitrogen. So Statement (I) is incorrect.
Step 2: In well aerated soils, nitrate is the form of nitrogen present in largest amount and most readily taken up by plant roots, so Statement (II) is correct.
Step 3: Statement (I) is incorrect but Statement (II) is correct, so the answer is option 4.