QBManager

ELECTROCHEMISTRY

19853 Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

1

A g

2

M g

3

C u

4

C r

Explanation:

(b )The reduction potential of $M g$ is less than that of water $(E^{o} = - 0.83 V)$ . Hence their ions in the aqueous solution cannot be reduced instead water will be reduced
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$ .

ELECTROCHEMISTRY

19854 Which of the following aqueous solution will conduct an electric current quite well

1 Glycerol

2

H C l

3 Sugar

4 Pure water

Explanation:

(b) $H C l$ is an electrolyte.

ELECTROCHEMISTRY

19855 On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1

N a

2

H_{2}

3

S O_{2}

4

S O_{3}

Explanation:

(b) Water is reduced at the cathode and oxidized at the anode instead of $N a^{+}$ and $S O_{4}^{2 -}$ .
Cathode: $2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$
Anode : $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}$ .

ELECTROCHEMISTRY

19856 Electrolysis involves oxidation and reduction respectively at

1 Anode and cathode

2 Cathode and anode

3 At both the electrodes

4 None of the above

ELECTROCHEMISTRY

19857 Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

1 Sugar

2 Sodium Chloride

3 Sodium Bromide

4 Sodium Acetate

ELECTROCHEMISTRY

19853 Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

1

A g

2

M g

3

C u

4

C r

Explanation:

(b )The reduction potential of $M g$ is less than that of water $(E^{o} = - 0.83 V)$ . Hence their ions in the aqueous solution cannot be reduced instead water will be reduced
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$ .

ELECTROCHEMISTRY

19854 Which of the following aqueous solution will conduct an electric current quite well

1 Glycerol

2

H C l

3 Sugar

4 Pure water

Explanation:

(b) $H C l$ is an electrolyte.

ELECTROCHEMISTRY

19855 On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1

N a

2

H_{2}

3

S O_{2}

4

S O_{3}

Explanation:

(b) Water is reduced at the cathode and oxidized at the anode instead of $N a^{+}$ and $S O_{4}^{2 -}$ .
Cathode: $2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$
Anode : $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}$ .

ELECTROCHEMISTRY

19856 Electrolysis involves oxidation and reduction respectively at

1 Anode and cathode

2 Cathode and anode

3 At both the electrodes

4 None of the above

ELECTROCHEMISTRY

19857 Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

1 Sugar

2 Sodium Chloride

3 Sodium Bromide

4 Sodium Acetate

ELECTROCHEMISTRY

19853 Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

1

A g

2

M g

3

C u

4

C r

Explanation:

(b )The reduction potential of $M g$ is less than that of water $(E^{o} = - 0.83 V)$ . Hence their ions in the aqueous solution cannot be reduced instead water will be reduced
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$ .

ELECTROCHEMISTRY

19854 Which of the following aqueous solution will conduct an electric current quite well

1 Glycerol

2

H C l

3 Sugar

4 Pure water

Explanation:

(b) $H C l$ is an electrolyte.

ELECTROCHEMISTRY

19855 On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1

N a

2

H_{2}

3

S O_{2}

4

S O_{3}

Explanation:

(b) Water is reduced at the cathode and oxidized at the anode instead of $N a^{+}$ and $S O_{4}^{2 -}$ .
Cathode: $2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$
Anode : $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}$ .

ELECTROCHEMISTRY

19856 Electrolysis involves oxidation and reduction respectively at

1 Anode and cathode

2 Cathode and anode

3 At both the electrodes

4 None of the above

ELECTROCHEMISTRY

19857 Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

1 Sugar

2 Sodium Chloride

3 Sodium Bromide

4 Sodium Acetate

ELECTROCHEMISTRY

19853 Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

1

A g

2

M g

3

C u

4

C r

Explanation:

(b )The reduction potential of $M g$ is less than that of water $(E^{o} = - 0.83 V)$ . Hence their ions in the aqueous solution cannot be reduced instead water will be reduced
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$ .

ELECTROCHEMISTRY

19854 Which of the following aqueous solution will conduct an electric current quite well

1 Glycerol

2

H C l

3 Sugar

4 Pure water

Explanation:

(b) $H C l$ is an electrolyte.

ELECTROCHEMISTRY

19855 On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1

N a

2

H_{2}

3

S O_{2}

4

S O_{3}

Explanation:

(b) Water is reduced at the cathode and oxidized at the anode instead of $N a^{+}$ and $S O_{4}^{2 -}$ .
Cathode: $2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$
Anode : $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}$ .

ELECTROCHEMISTRY

19856 Electrolysis involves oxidation and reduction respectively at

1 Anode and cathode

2 Cathode and anode

3 At both the electrodes

4 None of the above

ELECTROCHEMISTRY

19857 Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

1 Sugar

2 Sodium Chloride

3 Sodium Bromide

4 Sodium Acetate

ELECTROCHEMISTRY

19853 Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

1

A g

2

M g

3

C u

4

C r

Explanation:

(b )The reduction potential of $M g$ is less than that of water $(E^{o} = - 0.83 V)$ . Hence their ions in the aqueous solution cannot be reduced instead water will be reduced
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$ .

ELECTROCHEMISTRY

19854 Which of the following aqueous solution will conduct an electric current quite well

1 Glycerol

2

H C l

3 Sugar

4 Pure water

Explanation:

(b) $H C l$ is an electrolyte.

ELECTROCHEMISTRY

19855 On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1

N a

2

H_{2}

3

S O_{2}

4

S O_{3}

Explanation:

(b) Water is reduced at the cathode and oxidized at the anode instead of $N a^{+}$ and $S O_{4}^{2 -}$ .
Cathode: $2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$
Anode : $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}$ .

ELECTROCHEMISTRY

19856 Electrolysis involves oxidation and reduction respectively at

1 Anode and cathode

2 Cathode and anode

3 At both the electrodes

4 None of the above

ELECTROCHEMISTRY

19857 Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

1 Sugar

2 Sodium Chloride

3 Sodium Bromide

4 Sodium Acetate

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