Assertion :Leguminous plants are nitrogen fixers. Reason: Leguminous plants have Rhizobium in their root nodules.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
There are two types of nitrogen-fixing bacteria one is free-living bacteria like cyanobacteria (Nostoc) and another one is symbiotic bacteria like Rhizobium. Rhizobium forms a symbiotic association with the roots nodules of leguminous plants for nitrogen fixation. Thus, the correct answer is option A.

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Similar questions

Q. Assertion :Leguminous plants are nitrogen fixers Reason: Leguminous plants have Rhizobium in their root nodules

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(1 + \frac{P b}{R T})

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and

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can be derived from Van der Waal's equation.

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Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

Assertion: Be and Al have similar properties.

Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

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