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CHXI09:HYDROGEN

315559 Assertion :
Temporary hardness can be removed by boiling.
Reason :
Bicarbonates are precipitated in the form of carbonates due to boiling.

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.

CHXI09:HYDROGEN

315706 Match the column I with Column II choose the correct option
Column I
Column II
A
$\begin{array}{l} Coordinated \\ water \end{array}$
P
$\begin{array}{l} {[Cu {({II}_{2} O)}_{4}]}^{4 +} \\ {SO}_{4}^{2 -} \cdot H_{2} O \end{array}$
B
$\begin{array}{l} Interstitial \\ water \end{array}$
Q
$C_{17} H_{35} COONa$
C
$\begin{array}{l} Hydrogen- \\ bonded water \end{array}$
R
${BaCl}_{2} \cdot 2 H_{2} O$
S
${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$

1

A - R, B - S, C - Q

2

A - Q, B - R, C - S

3

A - R, B - Q, C - P

4

A - S, B - R, C - P

Explanation:

Many salts can be crystallised as hydrated salts from an aqueous solutions. Such association of water is of different types viz.,
(i) Coordinated water e.g., ${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$
(ii) Interstitial water e.g., ${BaCl}_{2} \cdot 2 H_{2} O$
(iii) Hydrogen-bonded water $\begin{aligned} e.g., {[Cu {(H_{2} O)}_{4}]}^{4 +} {SO}_{4}^{2 -} \cdot H_{2} O in {CuSO}_{4} \cdot 5 H_{2} O \end{aligned}$

CHXI09:HYDROGEN

315707 The number of hydrogen-bonded water molecule(s) are associated in ${CuSO}_{4} \cdot 5 H_{2} O$ is

1 1

2 2

3 3

4 4

Explanation:

Only one water molecule, which is outside the brackets (coordination sphere), is hydrogen-bonded. The other four molecules of water are coordinated. $[Cu {(H_{2} O)}_{4}] {SO}_{4} \cdot H_{2} O$

CHXI09:HYDROGEN

315708 $D_{2} O + A l_{4} C_{3} \to x + Al(OD)_{3}$
The number of deuterium atoms in 0.5 mol of 'x' is $y \times N_{A}$ . The value of 'y' is ____.
[ $N_{A} =$ Avogadro number]

1 1

2 2

3 3

4 4

Explanation:

$12 D_{2} O + A l_{4} C_{3} \to \underset{(x)}{3 C D_{4}} + 4 A l {(O D)}_{3}$
1 mol of ${CD}_{4} \equiv 4 mol$ of $D$ atoms
$∴ 0.5 mol$ of ${CD}_{4} = 2 mol$ of D atoms $= (2 \times N_{A}) D atoms$
$∴$ Value of ' $y$ ' is 2 .

CHXI09:HYDROGEN

315559 Assertion :
Temporary hardness can be removed by boiling.
Reason :
Bicarbonates are precipitated in the form of carbonates due to boiling.

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.

CHXI09:HYDROGEN

315706 Match the column I with Column II choose the correct option
Column I
Column II
A
$\begin{array}{l} Coordinated \\ water \end{array}$
P
$\begin{array}{l} {[Cu {({II}_{2} O)}_{4}]}^{4 +} \\ {SO}_{4}^{2 -} \cdot H_{2} O \end{array}$
B
$\begin{array}{l} Interstitial \\ water \end{array}$
Q
$C_{17} H_{35} COONa$
C
$\begin{array}{l} Hydrogen- \\ bonded water \end{array}$
R
${BaCl}_{2} \cdot 2 H_{2} O$
S
${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$

1

A - R, B - S, C - Q

2

A - Q, B - R, C - S

3

A - R, B - Q, C - P

4

A - S, B - R, C - P

Explanation:

Many salts can be crystallised as hydrated salts from an aqueous solutions. Such association of water is of different types viz.,
(i) Coordinated water e.g., ${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$
(ii) Interstitial water e.g., ${BaCl}_{2} \cdot 2 H_{2} O$
(iii) Hydrogen-bonded water $\begin{aligned} e.g., {[Cu {(H_{2} O)}_{4}]}^{4 +} {SO}_{4}^{2 -} \cdot H_{2} O in {CuSO}_{4} \cdot 5 H_{2} O \end{aligned}$

CHXI09:HYDROGEN

315707 The number of hydrogen-bonded water molecule(s) are associated in ${CuSO}_{4} \cdot 5 H_{2} O$ is

1 1

2 2

3 3

4 4

Explanation:

Only one water molecule, which is outside the brackets (coordination sphere), is hydrogen-bonded. The other four molecules of water are coordinated. $[Cu {(H_{2} O)}_{4}] {SO}_{4} \cdot H_{2} O$

CHXI09:HYDROGEN

315708 $D_{2} O + A l_{4} C_{3} \to x + Al(OD)_{3}$
The number of deuterium atoms in 0.5 mol of 'x' is $y \times N_{A}$ . The value of 'y' is ____.
[ $N_{A} =$ Avogadro number]

1 1

2 2

3 3

4 4

Explanation:

$12 D_{2} O + A l_{4} C_{3} \to \underset{(x)}{3 C D_{4}} + 4 A l {(O D)}_{3}$
1 mol of ${CD}_{4} \equiv 4 mol$ of $D$ atoms
$∴ 0.5 mol$ of ${CD}_{4} = 2 mol$ of D atoms $= (2 \times N_{A}) D atoms$
$∴$ Value of ' $y$ ' is 2 .

CHXI09:HYDROGEN

315559 Assertion :
Temporary hardness can be removed by boiling.
Reason :
Bicarbonates are precipitated in the form of carbonates due to boiling.

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.

CHXI09:HYDROGEN

315706 Match the column I with Column II choose the correct option
Column I
Column II
A
$\begin{array}{l} Coordinated \\ water \end{array}$
P
$\begin{array}{l} {[Cu {({II}_{2} O)}_{4}]}^{4 +} \\ {SO}_{4}^{2 -} \cdot H_{2} O \end{array}$
B
$\begin{array}{l} Interstitial \\ water \end{array}$
Q
$C_{17} H_{35} COONa$
C
$\begin{array}{l} Hydrogen- \\ bonded water \end{array}$
R
${BaCl}_{2} \cdot 2 H_{2} O$
S
${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$

1

A - R, B - S, C - Q

2

A - Q, B - R, C - S

3

A - R, B - Q, C - P

4

A - S, B - R, C - P

Explanation:

Many salts can be crystallised as hydrated salts from an aqueous solutions. Such association of water is of different types viz.,
(i) Coordinated water e.g., ${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$
(ii) Interstitial water e.g., ${BaCl}_{2} \cdot 2 H_{2} O$
(iii) Hydrogen-bonded water $\begin{aligned} e.g., {[Cu {(H_{2} O)}_{4}]}^{4 +} {SO}_{4}^{2 -} \cdot H_{2} O in {CuSO}_{4} \cdot 5 H_{2} O \end{aligned}$

CHXI09:HYDROGEN

315707 The number of hydrogen-bonded water molecule(s) are associated in ${CuSO}_{4} \cdot 5 H_{2} O$ is

1 1

2 2

3 3

4 4

Explanation:

Only one water molecule, which is outside the brackets (coordination sphere), is hydrogen-bonded. The other four molecules of water are coordinated. $[Cu {(H_{2} O)}_{4}] {SO}_{4} \cdot H_{2} O$

CHXI09:HYDROGEN

315708 $D_{2} O + A l_{4} C_{3} \to x + Al(OD)_{3}$
The number of deuterium atoms in 0.5 mol of 'x' is $y \times N_{A}$ . The value of 'y' is ____.
[ $N_{A} =$ Avogadro number]

1 1

2 2

3 3

4 4

Explanation:

$12 D_{2} O + A l_{4} C_{3} \to \underset{(x)}{3 C D_{4}} + 4 A l {(O D)}_{3}$
1 mol of ${CD}_{4} \equiv 4 mol$ of $D$ atoms
$∴ 0.5 mol$ of ${CD}_{4} = 2 mol$ of D atoms $= (2 \times N_{A}) D atoms$
$∴$ Value of ' $y$ ' is 2 .

CHXI09:HYDROGEN

315559 Assertion :
Temporary hardness can be removed by boiling.
Reason :
Bicarbonates are precipitated in the form of carbonates due to boiling.

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.

CHXI09:HYDROGEN

315706 Match the column I with Column II choose the correct option
Column I
Column II
A
$\begin{array}{l} Coordinated \\ water \end{array}$
P
$\begin{array}{l} {[Cu {({II}_{2} O)}_{4}]}^{4 +} \\ {SO}_{4}^{2 -} \cdot H_{2} O \end{array}$
B
$\begin{array}{l} Interstitial \\ water \end{array}$
Q
$C_{17} H_{35} COONa$
C
$\begin{array}{l} Hydrogen- \\ bonded water \end{array}$
R
${BaCl}_{2} \cdot 2 H_{2} O$
S
${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$

1

A - R, B - S, C - Q

2

A - Q, B - R, C - S

3

A - R, B - Q, C - P

4

A - S, B - R, C - P

Explanation:

Many salts can be crystallised as hydrated salts from an aqueous solutions. Such association of water is of different types viz.,
(i) Coordinated water e.g., ${[Cr {(H_{2} O)}_{6}]}^{3 +} 3 {Cl}^{-}$
(ii) Interstitial water e.g., ${BaCl}_{2} \cdot 2 H_{2} O$
(iii) Hydrogen-bonded water $\begin{aligned} e.g., {[Cu {(H_{2} O)}_{4}]}^{4 +} {SO}_{4}^{2 -} \cdot H_{2} O in {CuSO}_{4} \cdot 5 H_{2} O \end{aligned}$

CHXI09:HYDROGEN

315707 The number of hydrogen-bonded water molecule(s) are associated in ${CuSO}_{4} \cdot 5 H_{2} O$ is

1 1

2 2

3 3

4 4

Explanation:

Only one water molecule, which is outside the brackets (coordination sphere), is hydrogen-bonded. The other four molecules of water are coordinated. $[Cu {(H_{2} O)}_{4}] {SO}_{4} \cdot H_{2} O$

CHXI09:HYDROGEN

315708 $D_{2} O + A l_{4} C_{3} \to x + Al(OD)_{3}$
The number of deuterium atoms in 0.5 mol of 'x' is $y \times N_{A}$ . The value of 'y' is ____.
[ $N_{A} =$ Avogadro number]

1 1

2 2

3 3

4 4

Explanation:

$12 D_{2} O + A l_{4} C_{3} \to \underset{(x)}{3 C D_{4}} + 4 A l {(O D)}_{3}$
1 mol of ${CD}_{4} \equiv 4 mol$ of $D$ atoms
$∴ 0.5 mol$ of ${CD}_{4} = 2 mol$ of D atoms $= (2 \times N_{A}) D atoms$
$∴$ Value of ' $y$ ' is 2 .

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