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Byju's Answer

Standard XII

Chemistry

Vant Hoff's Equation and Effect of Temperature on Equilibrium Constant

Given below a...

Question

Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The boiling point of $N H_{3}$ is maximum among the hydrides of group $15$ .
Reason (R): $N H_{3}$ forms intermolecular hydrogen bonding.
[0.77 Mark]

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

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

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A is true but R is false

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A is false but R is true

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Solution

The correct option is D A is false but R is true
Correct order of boiling point of the hydrides of group $15$ is
$B i H_{3} > S b H_{3} > N H_{3} > A s H_{3} > P H_{3}$
$N H_{3}$ forms intermolecular hydrogen bonding.

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Similar questions

Q. Assertion: The boiling point order of group

15

hydrides is

P H_{3} < A s H_{3} < N H_{3} < S b H_{3} < B i H_{3}

.
Reason:

H

-bonding in

N H_{3}

dominates van der Waals forces in bigger

S b

molecules.

Q. Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Generally, interhalogen compounds are more reactive than halogens (except fluorine).
Reason (R):

X - X^{'}

bond in interhalogens is weaker than

X - X

bond in halogens except

F - F

bond.
[0.77 Mark]

Q. Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A) : –Cl is an o, p-directing group.
Reason (R) : –Cl activates the ring, towards electrophilic substitution reaction.
[0.77 Mark]

Q. Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Anisole on reaction with 1 eq.

H I

gives iodobenzene and methanol.
Reason (R): Reaction follows

S_{N} 2

mechanism.
[0.77 Mark]

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Given below are two statements labelled as Assertion (A) and Reason (R). Assertion (A): The boiling point of NH3 is maximum among the hydrides of group 15. Reason (R): NH3 forms intermolecular hydrogen bonding. [0.77 Mark]

The correct option is D A is false but R is trueCorrect order of boiling point of the hydrides of group 15 is BiH3>SbH3>NH3>AsH3>PH3 NH3 forms intermolecular hydrogen bonding.

Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The boiling point of $N H_{3}$ is maximum among the hydrides of group $15$ .
Reason (R): $N H_{3}$ forms intermolecular hydrogen bonding.
[0.77 Mark]

The correct option is D A is false but R is true
Correct order of boiling point of the hydrides of group $15$ is
$B i H_{3} > S b H_{3} > N H_{3} > A s H_{3} > P H_{3}$
$N H_{3}$ forms intermolecular hydrogen bonding.