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CHXI11:THE P-BLOCK ELEMENTS

316331 The number of paramagnetic species from the following is ____ .
${Cl}_{2} O, {ClO}_{2}, {Cl}_{2} O_{6}, {Cl}_{2} O_{7}$

1 1

2 2

3 3

4 4

Explanation:

Only ${ClO}_{2}$ is paramagnetic.

CHXI11:THE P-BLOCK ELEMENTS

316332 Yellow colour of chlorine water fades because of

1 Form action of

HCl

and

HOCl

2 Chlorine gas escapes

3

{ClO}_{2} + H_{2}

4

{Cl}_{2} O

Explanation:

Chlorine water on standing loses yellow colour due to formation of $HCl$ and $HOCl$ which in turn provides nascent oxygen.
$\begin{aligned} {Cl}_{2} + H_{2} O \to HCl + HOCl \\ HClO \to HCl + \underset{Nascent oxygen}{[O]} \end{aligned}$

AIIMS - 2019

CHXI11:THE P-BLOCK ELEMENTS

316333 Decomposition of ozone can be caused by

1 atomic helium

2 water vapour

3 dust particles

4 atomic chlorine.

CHXI11:THE P-BLOCK ELEMENTS

316334 The number of lone pairs of electrons on Cl in a ${ClF}_{3}$ molecule is ____ .

1 0

2 2

3 1

4 5

Explanation:

The structure of ${ClF}_{3}$ is as follows:
supporting img

CHXI11:THE P-BLOCK ELEMENTS

316335 Explain why the stability of oxoacids of chlorine increases in the order given below :
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

1 Dispersal of negative charge on Chlorine increases with number of oxygens

2 More oxygen more stability

3 Oxygen forms double bonds with chlorine

4 Chlorine donates electrons to oxygen

Explanation:

Oxygen is more electronegative than chlorine, therefore dispersal of negative charge present on chlorine increases from ${ClO}^{-}$ to ${ClO}_{4}^{-}$ ion because number of oxygen atoms attached to chlorine is increasing. Therefore, stability of ions will increase in the order given below:
${ClO}^{-} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}_{4}^{-}$
Thus, due to increase in stability of conjugate base, acidic strength of corresponding acid increases in the following order:
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

CHXI11:THE P-BLOCK ELEMENTS

316331 The number of paramagnetic species from the following is ____ .
${Cl}_{2} O, {ClO}_{2}, {Cl}_{2} O_{6}, {Cl}_{2} O_{7}$

1 1

2 2

3 3

4 4

Explanation:

Only ${ClO}_{2}$ is paramagnetic.

CHXI11:THE P-BLOCK ELEMENTS

316332 Yellow colour of chlorine water fades because of

1 Form action of

HCl

and

HOCl

2 Chlorine gas escapes

3

{ClO}_{2} + H_{2}

4

{Cl}_{2} O

Explanation:

Chlorine water on standing loses yellow colour due to formation of $HCl$ and $HOCl$ which in turn provides nascent oxygen.
$\begin{aligned} {Cl}_{2} + H_{2} O \to HCl + HOCl \\ HClO \to HCl + \underset{Nascent oxygen}{[O]} \end{aligned}$

AIIMS - 2019

CHXI11:THE P-BLOCK ELEMENTS

316333 Decomposition of ozone can be caused by

1 atomic helium

2 water vapour

3 dust particles

4 atomic chlorine.

CHXI11:THE P-BLOCK ELEMENTS

316334 The number of lone pairs of electrons on Cl in a ${ClF}_{3}$ molecule is ____ .

1 0

2 2

3 1

4 5

Explanation:

The structure of ${ClF}_{3}$ is as follows:
supporting img

CHXI11:THE P-BLOCK ELEMENTS

316335 Explain why the stability of oxoacids of chlorine increases in the order given below :
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

1 Dispersal of negative charge on Chlorine increases with number of oxygens

2 More oxygen more stability

3 Oxygen forms double bonds with chlorine

4 Chlorine donates electrons to oxygen

Explanation:

Oxygen is more electronegative than chlorine, therefore dispersal of negative charge present on chlorine increases from ${ClO}^{-}$ to ${ClO}_{4}^{-}$ ion because number of oxygen atoms attached to chlorine is increasing. Therefore, stability of ions will increase in the order given below:
${ClO}^{-} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}_{4}^{-}$
Thus, due to increase in stability of conjugate base, acidic strength of corresponding acid increases in the following order:
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

CHXI11:THE P-BLOCK ELEMENTS

316331 The number of paramagnetic species from the following is ____ .
${Cl}_{2} O, {ClO}_{2}, {Cl}_{2} O_{6}, {Cl}_{2} O_{7}$

1 1

2 2

3 3

4 4

Explanation:

Only ${ClO}_{2}$ is paramagnetic.

CHXI11:THE P-BLOCK ELEMENTS

316332 Yellow colour of chlorine water fades because of

1 Form action of

HCl

and

HOCl

2 Chlorine gas escapes

3

{ClO}_{2} + H_{2}

4

{Cl}_{2} O

Explanation:

Chlorine water on standing loses yellow colour due to formation of $HCl$ and $HOCl$ which in turn provides nascent oxygen.
$\begin{aligned} {Cl}_{2} + H_{2} O \to HCl + HOCl \\ HClO \to HCl + \underset{Nascent oxygen}{[O]} \end{aligned}$

AIIMS - 2019

CHXI11:THE P-BLOCK ELEMENTS

316333 Decomposition of ozone can be caused by

1 atomic helium

2 water vapour

3 dust particles

4 atomic chlorine.

CHXI11:THE P-BLOCK ELEMENTS

316334 The number of lone pairs of electrons on Cl in a ${ClF}_{3}$ molecule is ____ .

1 0

2 2

3 1

4 5

Explanation:

The structure of ${ClF}_{3}$ is as follows:
supporting img

CHXI11:THE P-BLOCK ELEMENTS

316335 Explain why the stability of oxoacids of chlorine increases in the order given below :
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

1 Dispersal of negative charge on Chlorine increases with number of oxygens

2 More oxygen more stability

3 Oxygen forms double bonds with chlorine

4 Chlorine donates electrons to oxygen

Explanation:

Oxygen is more electronegative than chlorine, therefore dispersal of negative charge present on chlorine increases from ${ClO}^{-}$ to ${ClO}_{4}^{-}$ ion because number of oxygen atoms attached to chlorine is increasing. Therefore, stability of ions will increase in the order given below:
${ClO}^{-} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}_{4}^{-}$
Thus, due to increase in stability of conjugate base, acidic strength of corresponding acid increases in the following order:
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

CHXI11:THE P-BLOCK ELEMENTS

316331 The number of paramagnetic species from the following is ____ .
${Cl}_{2} O, {ClO}_{2}, {Cl}_{2} O_{6}, {Cl}_{2} O_{7}$

1 1

2 2

3 3

4 4

Explanation:

Only ${ClO}_{2}$ is paramagnetic.

CHXI11:THE P-BLOCK ELEMENTS

316332 Yellow colour of chlorine water fades because of

1 Form action of

HCl

and

HOCl

2 Chlorine gas escapes

3

{ClO}_{2} + H_{2}

4

{Cl}_{2} O

Explanation:

Chlorine water on standing loses yellow colour due to formation of $HCl$ and $HOCl$ which in turn provides nascent oxygen.
$\begin{aligned} {Cl}_{2} + H_{2} O \to HCl + HOCl \\ HClO \to HCl + \underset{Nascent oxygen}{[O]} \end{aligned}$

AIIMS - 2019

CHXI11:THE P-BLOCK ELEMENTS

316333 Decomposition of ozone can be caused by

1 atomic helium

2 water vapour

3 dust particles

4 atomic chlorine.

CHXI11:THE P-BLOCK ELEMENTS

316334 The number of lone pairs of electrons on Cl in a ${ClF}_{3}$ molecule is ____ .

1 0

2 2

3 1

4 5

Explanation:

The structure of ${ClF}_{3}$ is as follows:
supporting img

CHXI11:THE P-BLOCK ELEMENTS

316335 Explain why the stability of oxoacids of chlorine increases in the order given below :
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

1 Dispersal of negative charge on Chlorine increases with number of oxygens

2 More oxygen more stability

3 Oxygen forms double bonds with chlorine

4 Chlorine donates electrons to oxygen

Explanation:

Oxygen is more electronegative than chlorine, therefore dispersal of negative charge present on chlorine increases from ${ClO}^{-}$ to ${ClO}_{4}^{-}$ ion because number of oxygen atoms attached to chlorine is increasing. Therefore, stability of ions will increase in the order given below:
${ClO}^{-} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}_{4}^{-}$
Thus, due to increase in stability of conjugate base, acidic strength of corresponding acid increases in the following order:
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

CHXI11:THE P-BLOCK ELEMENTS

316331 The number of paramagnetic species from the following is ____ .
${Cl}_{2} O, {ClO}_{2}, {Cl}_{2} O_{6}, {Cl}_{2} O_{7}$

1 1

2 2

3 3

4 4

Explanation:

Only ${ClO}_{2}$ is paramagnetic.

CHXI11:THE P-BLOCK ELEMENTS

316332 Yellow colour of chlorine water fades because of

1 Form action of

HCl

and

HOCl

2 Chlorine gas escapes

3

{ClO}_{2} + H_{2}

4

{Cl}_{2} O

Explanation:

Chlorine water on standing loses yellow colour due to formation of $HCl$ and $HOCl$ which in turn provides nascent oxygen.
$\begin{aligned} {Cl}_{2} + H_{2} O \to HCl + HOCl \\ HClO \to HCl + \underset{Nascent oxygen}{[O]} \end{aligned}$

AIIMS - 2019

CHXI11:THE P-BLOCK ELEMENTS

316333 Decomposition of ozone can be caused by

1 atomic helium

2 water vapour

3 dust particles

4 atomic chlorine.

CHXI11:THE P-BLOCK ELEMENTS

316334 The number of lone pairs of electrons on Cl in a ${ClF}_{3}$ molecule is ____ .

1 0

2 2

3 1

4 5

Explanation:

The structure of ${ClF}_{3}$ is as follows:
supporting img

CHXI11:THE P-BLOCK ELEMENTS

316335 Explain why the stability of oxoacids of chlorine increases in the order given below :
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$

1 Dispersal of negative charge on Chlorine increases with number of oxygens

2 More oxygen more stability

3 Oxygen forms double bonds with chlorine

4 Chlorine donates electrons to oxygen

Explanation:

Oxygen is more electronegative than chlorine, therefore dispersal of negative charge present on chlorine increases from ${ClO}^{-}$ to ${ClO}_{4}^{-}$ ion because number of oxygen atoms attached to chlorine is increasing. Therefore, stability of ions will increase in the order given below:
${ClO}^{-} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}_{4}^{-}$
Thus, due to increase in stability of conjugate base, acidic strength of corresponding acid increases in the following order:
$HClO < {HClO}_{2} < {HClO}_{3} < {HClO}_{4}$