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CHXI09:HYDROGEN

315546 Permanent hardness of water can be removed by adding

1

{Na}_{2} {CO}_{3}

2

K

3

Ca (OCl) Cl

4

{Cl}_{2}

Explanation:

Washing soda, $({Na}_{2} {CO}_{3} \cdot 10 H_{2} O)$ is used to remove permanent hardness of water. It converts ${Ca}^{2 +}$ and ${Mg}^{2 +}$ salts (soluble) to carbonates (insoluble).
$\begin{array}{l} M g C l_{2} + N a_{2} C O_{3} \to M g C O_{3} ↓ \\ + 2 N a C l \end{array}$
$\begin{array}{l} C a S O_{4} + N a_{2} C O_{3} \to C a C O_{3} ↓ \\ + N a_{2} S O_{4} \end{array}$

CHXI09:HYDROGEN

315547 A sample of water containing some dissolved sugar and table salt is passed through organic ion exchange resins. The resulting water will be

1 Tasteless

2 Sweet

3 Salty

4 Bitter

Explanation:

Ionic impurites like ${Na}^{+}$ and ${Cl}^{-}$ ions are removed by organic ion exchanges leaving sugar in the water sample.

CHXI09:HYDROGEN

315548 Calgon, a water softner is

1 sodium aluminosilicate

2 sodium hexametaphosphate

3 sodium zeolite

4 sodium bicarbonate

Explanation:

Calgon removes $Ca$ and $Mg$ ions from hard water by forming a soluble complex.
$\begin{matrix} {2Ca}_{Hard water}^{2 +} + \underset{calgon}{N a_{2}} [N a_{4} {(P O_{3})}_{6}] \to \\ N a_{2} \underset{Soluble complex}{[C a_{2} {(P O_{3})}_{6}]} + 2N a^{+} \end{matrix}$

CHXI09:HYDROGEN

315549 Assertion :
Permanent hardness of water is removed by treatment with washing soda.
Reason :
Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

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

315546 Permanent hardness of water can be removed by adding

1

{Na}_{2} {CO}_{3}

2

K

3

Ca (OCl) Cl

4

{Cl}_{2}

Explanation:

Washing soda, $({Na}_{2} {CO}_{3} \cdot 10 H_{2} O)$ is used to remove permanent hardness of water. It converts ${Ca}^{2 +}$ and ${Mg}^{2 +}$ salts (soluble) to carbonates (insoluble).
$\begin{array}{l} M g C l_{2} + N a_{2} C O_{3} \to M g C O_{3} ↓ \\ + 2 N a C l \end{array}$
$\begin{array}{l} C a S O_{4} + N a_{2} C O_{3} \to C a C O_{3} ↓ \\ + N a_{2} S O_{4} \end{array}$

CHXI09:HYDROGEN

315547 A sample of water containing some dissolved sugar and table salt is passed through organic ion exchange resins. The resulting water will be

1 Tasteless

2 Sweet

3 Salty

4 Bitter

Explanation:

Ionic impurites like ${Na}^{+}$ and ${Cl}^{-}$ ions are removed by organic ion exchanges leaving sugar in the water sample.

CHXI09:HYDROGEN

315548 Calgon, a water softner is

1 sodium aluminosilicate

2 sodium hexametaphosphate

3 sodium zeolite

4 sodium bicarbonate

Explanation:

Calgon removes $Ca$ and $Mg$ ions from hard water by forming a soluble complex.
$\begin{matrix} {2Ca}_{Hard water}^{2 +} + \underset{calgon}{N a_{2}} [N a_{4} {(P O_{3})}_{6}] \to \\ N a_{2} \underset{Soluble complex}{[C a_{2} {(P O_{3})}_{6}]} + 2N a^{+} \end{matrix}$

CHXI09:HYDROGEN

315549 Assertion :
Permanent hardness of water is removed by treatment with washing soda.
Reason :
Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

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

315546 Permanent hardness of water can be removed by adding

1

{Na}_{2} {CO}_{3}

2

K

3

Ca (OCl) Cl

4

{Cl}_{2}

Explanation:

Washing soda, $({Na}_{2} {CO}_{3} \cdot 10 H_{2} O)$ is used to remove permanent hardness of water. It converts ${Ca}^{2 +}$ and ${Mg}^{2 +}$ salts (soluble) to carbonates (insoluble).
$\begin{array}{l} M g C l_{2} + N a_{2} C O_{3} \to M g C O_{3} ↓ \\ + 2 N a C l \end{array}$
$\begin{array}{l} C a S O_{4} + N a_{2} C O_{3} \to C a C O_{3} ↓ \\ + N a_{2} S O_{4} \end{array}$

CHXI09:HYDROGEN

315547 A sample of water containing some dissolved sugar and table salt is passed through organic ion exchange resins. The resulting water will be

1 Tasteless

2 Sweet

3 Salty

4 Bitter

Explanation:

Ionic impurites like ${Na}^{+}$ and ${Cl}^{-}$ ions are removed by organic ion exchanges leaving sugar in the water sample.

CHXI09:HYDROGEN

315548 Calgon, a water softner is

1 sodium aluminosilicate

2 sodium hexametaphosphate

3 sodium zeolite

4 sodium bicarbonate

Explanation:

Calgon removes $Ca$ and $Mg$ ions from hard water by forming a soluble complex.
$\begin{matrix} {2Ca}_{Hard water}^{2 +} + \underset{calgon}{N a_{2}} [N a_{4} {(P O_{3})}_{6}] \to \\ N a_{2} \underset{Soluble complex}{[C a_{2} {(P O_{3})}_{6}]} + 2N a^{+} \end{matrix}$

CHXI09:HYDROGEN

315549 Assertion :
Permanent hardness of water is removed by treatment with washing soda.
Reason :
Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

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

315546 Permanent hardness of water can be removed by adding

1

{Na}_{2} {CO}_{3}

2

K

3

Ca (OCl) Cl

4

{Cl}_{2}

Explanation:

Washing soda, $({Na}_{2} {CO}_{3} \cdot 10 H_{2} O)$ is used to remove permanent hardness of water. It converts ${Ca}^{2 +}$ and ${Mg}^{2 +}$ salts (soluble) to carbonates (insoluble).
$\begin{array}{l} M g C l_{2} + N a_{2} C O_{3} \to M g C O_{3} ↓ \\ + 2 N a C l \end{array}$
$\begin{array}{l} C a S O_{4} + N a_{2} C O_{3} \to C a C O_{3} ↓ \\ + N a_{2} S O_{4} \end{array}$

CHXI09:HYDROGEN

315547 A sample of water containing some dissolved sugar and table salt is passed through organic ion exchange resins. The resulting water will be

1 Tasteless

2 Sweet

3 Salty

4 Bitter

Explanation:

Ionic impurites like ${Na}^{+}$ and ${Cl}^{-}$ ions are removed by organic ion exchanges leaving sugar in the water sample.

CHXI09:HYDROGEN

315548 Calgon, a water softner is

1 sodium aluminosilicate

2 sodium hexametaphosphate

3 sodium zeolite

4 sodium bicarbonate

Explanation:

Calgon removes $Ca$ and $Mg$ ions from hard water by forming a soluble complex.
$\begin{matrix} {2Ca}_{Hard water}^{2 +} + \underset{calgon}{N a_{2}} [N a_{4} {(P O_{3})}_{6}] \to \\ N a_{2} \underset{Soluble complex}{[C a_{2} {(P O_{3})}_{6}]} + 2N a^{+} \end{matrix}$

CHXI09:HYDROGEN

315549 Assertion :
Permanent hardness of water is removed by treatment with washing soda.
Reason :
Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

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.