MHT CET · BIOLOGY · STD 12 - 7. Plant Growth and Mineral Nutrition

Plants usually absorb Nitrogen in the form of nitrates because Nitrogen is ________.

A very reactive
B non reactive
C not very essential
D has a strong triple covalent bond

Verified Solution

Answer & Solution

Correct Answer

(B) non reactive

Step-by-step Solution

Detailed explanation

Atmospheric nitrogen (N2) has a strong triple covalent bond making it inert. Plants absorb nitrogen as nitrates because nitrate ions are reactive.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Stigma and pollen grain represent ________.

MHT CET 2023 Easy

Match the enzyme involved in Krebs cycle given in column-I with the reactions they catalyse given in column-II. Choose the correct option.

	Column I		Column II
i.	Isocitrate dehydrogenase	a.	Citrate → Cisaconitate
ii.	Fumarase	b.	Succinate → Fumarate
iii.	Aconitase	c.	Fumarate → Malate
Iv.	Succinate dehydrogenase	d.	Isocitrate → Oxalosuccinic acid

MHT CET 2023 Easy

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