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Important questions on Dinitrogen

Assertion

Nitrogen is unreactive at room temperature but becomes reactive at elevated temperature (on heating) or in the presence of catalysts.

Reason

In nitrogen molecule, there is extensive delocalisation of electrons.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Assertion is incorrect but Reason is correct
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In Kjeldahl's method, nitrogen present is estimated as:

A
B
C
D
none of these
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