Assertion (A): Though the central atom of both ${N H}_{3}$ and $H_{2} O$ molecules are ${s p}^{3} C$ hybridized,
yet H-N-H bond angle is greater than that of H-O-H.
Reason (R): This is because nitrogen atom has a lone pair and oxygen atom has two lone pairs.

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 correct explanation of A

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A is correct and R is incorrect

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A is incorrect and R is correct.

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Solution

The correct option is B Both A and R are true and R is the correct explanation of A
Lone pair has more repulsion than bond pair.
$∴ H_{2} O$ having 2 l.p has small angle.

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Similar questions

Q. Assertion (A):

{NH}_{3}

and

H_{2} O

molecules are

{sp}^{3}

hybridised, but the bond angle of

{NH}_{3}

is more than that of

H_{2} O

.

Reason (R): Nitrogen atom has one lone pair whereas oxygen atom has two lone pairs of electrons.

$A s s e r t i o n - --------- -$ (A): The boiling point of HF is higher than that of $H_{2} O$
$R e a s o n - ------- -$ (R): The hydrogen bond strength in HF is lower than that in $H_{2} O$

$Assertion - --------- -$ (A): The boiling point of HF is higher than that of $H_{2} O$ .
$Reason - ------ -$ (R): The hydrogen bond strength in HF is lower than that in $H_{2} O$ .

Q. Assertion (A)
The polynomial p(x) = x³ + x has one real zero.

Reason (R)
A polynomial of nth degree has at most n zeros.

(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.

This question consists of two statements, namely, Assertion (A) and Reason (R). For selecting the correct answer, use the following code:

(a) Both Assertion (A) and Reason (R) are true and Reason (R) correct explanation of Assertion (A).

(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

(d) Assertion (A) is false and Reason (R) is true.

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Assertion (A): Though the central atom of both NH3 and H2O molecules are sp3C hybridized, yet H-N-H bond angle is greater than that of H-O-H.Reason (R): This is because nitrogen atom has a lone pair and oxygen atom has two lone pairs.

The correct option is B Both A and R are true and R is the correct explanation of ALone pair has more repulsion than bond pair. ∴H2O having 2 l.p has small angle.

Assertion (A): Though the central atom of both ${N H}_{3}$ and $H_{2} O$ molecules are ${s p}^{3} C$ hybridized,
yet H-N-H bond angle is greater than that of H-O-H.
Reason (R): This is because nitrogen atom has a lone pair and oxygen atom has two lone pairs.

The correct option is B Both A and R are true and R is the correct explanation of A
Lone pair has more repulsion than bond pair.
$∴ H_{2} O$ having 2 l.p has small angle.