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CHXI11:THE P-BLOCK ELEMENTS

316269 Assertion :
$HBr$ is a weaker acid than HI.
Reason :
Bond energy of $HI$ is smaller than that of $HBr$ .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Hydroiodic acid (HI) is a stronger acid than hydrobromic acid $(HBr)$ because the weaker hydrogen-iodine bond in $HI$ facilitates easier dissociation, leading to the release of more $H^{+}$ ions compared to the stronger hydrogen-bromine bond in $HBr$ . Therefore, option (1) is correct.

CHXI11:THE P-BLOCK ELEMENTS

316270 Least volatile hydrogen halide is

1

HF

2

HCl

3

HI

4

HBr

Explanation:

Except HF (least volatile), all hydrogen halides are gases. HF is a liquid with boiling point ${19.5}^{\circ} C$ . This behaviour is due to association of $HF$ molecules through hydrogen bonding.
$\overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F}$

CHXI11:THE P-BLOCK ELEMENTS

316271 Among the following, the one that has the highest heat of vaporization is

1

HF

2

HCl

3

HBr

4

HI

CHXI11:THE P-BLOCK ELEMENTS

316272 The property that correspond to the order $HI >$ $HBr > HCl > HF$ is

1 Thermal stability

2 Reducing power

3 Ionic character

4 Bond strength

Explanation:

Reducing power and acidic strength $HI > HBr > HCl > HF$

CHXI11:THE P-BLOCK ELEMENTS

316269 Assertion :
$HBr$ is a weaker acid than HI.
Reason :
Bond energy of $HI$ is smaller than that of $HBr$ .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Hydroiodic acid (HI) is a stronger acid than hydrobromic acid $(HBr)$ because the weaker hydrogen-iodine bond in $HI$ facilitates easier dissociation, leading to the release of more $H^{+}$ ions compared to the stronger hydrogen-bromine bond in $HBr$ . Therefore, option (1) is correct.

CHXI11:THE P-BLOCK ELEMENTS

316270 Least volatile hydrogen halide is

1

HF

2

HCl

3

HI

4

HBr

Explanation:

Except HF (least volatile), all hydrogen halides are gases. HF is a liquid with boiling point ${19.5}^{\circ} C$ . This behaviour is due to association of $HF$ molecules through hydrogen bonding.
$\overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F}$

CHXI11:THE P-BLOCK ELEMENTS

316271 Among the following, the one that has the highest heat of vaporization is

1

HF

2

HCl

3

HBr

4

HI

CHXI11:THE P-BLOCK ELEMENTS

316272 The property that correspond to the order $HI >$ $HBr > HCl > HF$ is

1 Thermal stability

2 Reducing power

3 Ionic character

4 Bond strength

Explanation:

Reducing power and acidic strength $HI > HBr > HCl > HF$

CHXI11:THE P-BLOCK ELEMENTS

316269 Assertion :
$HBr$ is a weaker acid than HI.
Reason :
Bond energy of $HI$ is smaller than that of $HBr$ .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Hydroiodic acid (HI) is a stronger acid than hydrobromic acid $(HBr)$ because the weaker hydrogen-iodine bond in $HI$ facilitates easier dissociation, leading to the release of more $H^{+}$ ions compared to the stronger hydrogen-bromine bond in $HBr$ . Therefore, option (1) is correct.

CHXI11:THE P-BLOCK ELEMENTS

316270 Least volatile hydrogen halide is

1

HF

2

HCl

3

HI

4

HBr

Explanation:

Except HF (least volatile), all hydrogen halides are gases. HF is a liquid with boiling point ${19.5}^{\circ} C$ . This behaviour is due to association of $HF$ molecules through hydrogen bonding.
$\overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F}$

CHXI11:THE P-BLOCK ELEMENTS

316271 Among the following, the one that has the highest heat of vaporization is

1

HF

2

HCl

3

HBr

4

HI

CHXI11:THE P-BLOCK ELEMENTS

316272 The property that correspond to the order $HI >$ $HBr > HCl > HF$ is

1 Thermal stability

2 Reducing power

3 Ionic character

4 Bond strength

Explanation:

Reducing power and acidic strength $HI > HBr > HCl > HF$

CHXI11:THE P-BLOCK ELEMENTS

316269 Assertion :
$HBr$ is a weaker acid than HI.
Reason :
Bond energy of $HI$ is smaller than that of $HBr$ .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Hydroiodic acid (HI) is a stronger acid than hydrobromic acid $(HBr)$ because the weaker hydrogen-iodine bond in $HI$ facilitates easier dissociation, leading to the release of more $H^{+}$ ions compared to the stronger hydrogen-bromine bond in $HBr$ . Therefore, option (1) is correct.

CHXI11:THE P-BLOCK ELEMENTS

316270 Least volatile hydrogen halide is

1

HF

2

HCl

3

HI

4

HBr

Explanation:

Except HF (least volatile), all hydrogen halides are gases. HF is a liquid with boiling point ${19.5}^{\circ} C$ . This behaviour is due to association of $HF$ molecules through hydrogen bonding.
$\overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F} - - \overset{δ^{+}}{H} - \overset{δ^{-}}{F}$

CHXI11:THE P-BLOCK ELEMENTS

316271 Among the following, the one that has the highest heat of vaporization is

1

HF

2

HCl

3

HBr

4

HI

CHXI11:THE P-BLOCK ELEMENTS

316272 The property that correspond to the order $HI >$ $HBr > HCl > HF$ is

1 Thermal stability

2 Reducing power

3 Ionic character

4 Bond strength

Explanation:

Reducing power and acidic strength $HI > HBr > HCl > HF$

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