JEE Main 2015 · 10 Apr · Shift 1 · Chemistry Q34

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ChemistrySingle correct+4 / -1Question 34 of 90

After understanding the assertion and reason, choose the correct option.

Assertion : In the bonding molecular orbital (MO) of $\ce{H2}$ , electron density is increased between the nuclei.

Reason : The bonding MO is $\psi_A+\psi_B$ , which shows destructive interference of the combining electron waves.

Assertion and reason are correct and reason is the correct explanation for the assertion.

Assertion and reason are correct, but reason is not the correct explanation for the assertion.

Assertion is correct, reason is incorrect.

Assertion is incorrect, reason is correct.

Answer and worked solution

Official answer: C

The assertion is correct. But $\psi_A+\psi_B$ is constructive interference, which is what builds up electron density between the nuclei, so the reason is incorrect.

Topics:Molecular orbital theory

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JEE Main 2015 · 10 Apr · Shift 1, Chemistry question 34