Assertion :Oxygen is more electronegative than sulphur, yet $H_{2} S$ is acidic, while $H_{2} O$ is neutral. Reason: H-S bond is weaker than O-H bond.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Oxygen is more electronegative than sulphur, yet $H_{2} S$ is acidic, while $H_{2} O$ is neutral.
H-S bond is weaker than O-H bond due to greater size of S than that of O. It is easier to remove a proton from S-H bond than from O-H bond.
This can also be explained on the bases of fall in dissociation energy and charge density. Smaller oxide ion has larger charge density than bigger sulphide ion. Hence, sulphide ion is more stable and weaker base than oxide ion. Due to this, hydrogen sulphide is acidic and water is neutral.
Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Similar questions

Q. Assertion :Oxygen is more electronegative than sulphur,yet

H_{2} S

is acidic, while

H_{2} O

is neutral Reason: H---S bond is weaker than O---H bond

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If assertion and reason both are false.

Assertion : HOF bond angle is greater than HOCl bond angle.
Reason : Oxygen is more electronegative than halogens

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

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Assertion :Oxygen is more electronegative than sulphur, yet H2S is acidic, while H2O is neutral. Reason: H-S bond is weaker than O-H bond.

Assertion :Oxygen is more electronegative than sulphur, yet $H_{2} S$ is acidic, while $H_{2} O$ is neutral. Reason: H-S bond is weaker than O-H bond.