Assertion (A): Stability of $N H_{3}$ is greater than $P H_{3}$
Reason (R): M - H bond energy increases down the group in the hydrides of pnicogens.

Both (A) and (R) are true and (R) is the correct explanation of (A)

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Both (A) and (R) are true and (R) is not the correct explanation of (A)

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(A) is true and (R) is false

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(A) is false but (R) is true

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Solution

The correct option is C (A) is true and (R) is false
Reason is false.
M - H bond energy decreases down the group due to decrease in electronegativity.

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Assertion (A): Stability of NH3 is greater than PH3Reason (R): M - H bond energy increases down the group in the hydrides of pnicogens.

The correct option is C (A) is true and (R) is falseReason is false.M - H bond energy decreases down the group due to decrease in electronegativity.

Assertion (A): Stability of $N H_{3}$ is greater than $P H_{3}$
Reason (R): M - H bond energy increases down the group in the hydrides of pnicogens.

The correct option is C (A) is true and (R) is false
Reason is false.
M - H bond energy decreases down the group due to decrease in electronegativity.