330143
How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? \({\mathrm{\mathrm{Ag}, \mathrm{Ca}, \mathrm{Cu}, \mathrm{Mg}, \mathrm{Na}, \mathrm{Al}}}\)
1 6
2 2
3 1
4 5
Explanation:
\({\mathrm{\mathrm{Ca}, \mathrm{Mg}, \mathrm{Na}}}\) and Al have lower reduction potential than water \({\mathrm{\left(E^{\circ}=-0.83 \mathrm{~V}\right)}}\). Hence, they cannot be reduced in their aqueous solution. Instead water will get reduced to liberate \({\mathrm{\mathrm{H}_{2}}}\).
CHXII03:ELECTROCHEMISTRY
330144
When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution
1 The positive and negative ions will move towards the anode
2 The positive ions will start moving towards anode, the negative ions will stop moving
3 The negative ions will continue to move towards the anode, the positive ions will stop moving
4 The positive and negative ions will start moving randomly
Explanation:
After removing cathode no net charge will flow but ions move randomly.
CHXII03:ELECTROCHEMISTRY
330145
Which of the following processes makes use of electrolysis?
1 Electroplating
2 Both (1) and (2)
3 None of these
4 Electrorefining
Explanation:
Electrorefining and electroplating are electrolysis.
CHXII03:ELECTROCHEMISTRY
330146
An Electrolyte
1 Forms complex ions in solution
2 Gives ions only when electricity passed
3 Possesses ions even in solid state
4 Gives ions only when dissolved in water
Explanation:
An electrolyte gives ions only when dissolved in water.
330143
How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? \({\mathrm{\mathrm{Ag}, \mathrm{Ca}, \mathrm{Cu}, \mathrm{Mg}, \mathrm{Na}, \mathrm{Al}}}\)
1 6
2 2
3 1
4 5
Explanation:
\({\mathrm{\mathrm{Ca}, \mathrm{Mg}, \mathrm{Na}}}\) and Al have lower reduction potential than water \({\mathrm{\left(E^{\circ}=-0.83 \mathrm{~V}\right)}}\). Hence, they cannot be reduced in their aqueous solution. Instead water will get reduced to liberate \({\mathrm{\mathrm{H}_{2}}}\).
CHXII03:ELECTROCHEMISTRY
330144
When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution
1 The positive and negative ions will move towards the anode
2 The positive ions will start moving towards anode, the negative ions will stop moving
3 The negative ions will continue to move towards the anode, the positive ions will stop moving
4 The positive and negative ions will start moving randomly
Explanation:
After removing cathode no net charge will flow but ions move randomly.
CHXII03:ELECTROCHEMISTRY
330145
Which of the following processes makes use of electrolysis?
1 Electroplating
2 Both (1) and (2)
3 None of these
4 Electrorefining
Explanation:
Electrorefining and electroplating are electrolysis.
CHXII03:ELECTROCHEMISTRY
330146
An Electrolyte
1 Forms complex ions in solution
2 Gives ions only when electricity passed
3 Possesses ions even in solid state
4 Gives ions only when dissolved in water
Explanation:
An electrolyte gives ions only when dissolved in water.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXII03:ELECTROCHEMISTRY
330143
How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? \({\mathrm{\mathrm{Ag}, \mathrm{Ca}, \mathrm{Cu}, \mathrm{Mg}, \mathrm{Na}, \mathrm{Al}}}\)
1 6
2 2
3 1
4 5
Explanation:
\({\mathrm{\mathrm{Ca}, \mathrm{Mg}, \mathrm{Na}}}\) and Al have lower reduction potential than water \({\mathrm{\left(E^{\circ}=-0.83 \mathrm{~V}\right)}}\). Hence, they cannot be reduced in their aqueous solution. Instead water will get reduced to liberate \({\mathrm{\mathrm{H}_{2}}}\).
CHXII03:ELECTROCHEMISTRY
330144
When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution
1 The positive and negative ions will move towards the anode
2 The positive ions will start moving towards anode, the negative ions will stop moving
3 The negative ions will continue to move towards the anode, the positive ions will stop moving
4 The positive and negative ions will start moving randomly
Explanation:
After removing cathode no net charge will flow but ions move randomly.
CHXII03:ELECTROCHEMISTRY
330145
Which of the following processes makes use of electrolysis?
1 Electroplating
2 Both (1) and (2)
3 None of these
4 Electrorefining
Explanation:
Electrorefining and electroplating are electrolysis.
CHXII03:ELECTROCHEMISTRY
330146
An Electrolyte
1 Forms complex ions in solution
2 Gives ions only when electricity passed
3 Possesses ions even in solid state
4 Gives ions only when dissolved in water
Explanation:
An electrolyte gives ions only when dissolved in water.
330143
How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? \({\mathrm{\mathrm{Ag}, \mathrm{Ca}, \mathrm{Cu}, \mathrm{Mg}, \mathrm{Na}, \mathrm{Al}}}\)
1 6
2 2
3 1
4 5
Explanation:
\({\mathrm{\mathrm{Ca}, \mathrm{Mg}, \mathrm{Na}}}\) and Al have lower reduction potential than water \({\mathrm{\left(E^{\circ}=-0.83 \mathrm{~V}\right)}}\). Hence, they cannot be reduced in their aqueous solution. Instead water will get reduced to liberate \({\mathrm{\mathrm{H}_{2}}}\).
CHXII03:ELECTROCHEMISTRY
330144
When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution
1 The positive and negative ions will move towards the anode
2 The positive ions will start moving towards anode, the negative ions will stop moving
3 The negative ions will continue to move towards the anode, the positive ions will stop moving
4 The positive and negative ions will start moving randomly
Explanation:
After removing cathode no net charge will flow but ions move randomly.
CHXII03:ELECTROCHEMISTRY
330145
Which of the following processes makes use of electrolysis?
1 Electroplating
2 Both (1) and (2)
3 None of these
4 Electrorefining
Explanation:
Electrorefining and electroplating are electrolysis.
CHXII03:ELECTROCHEMISTRY
330146
An Electrolyte
1 Forms complex ions in solution
2 Gives ions only when electricity passed
3 Possesses ions even in solid state
4 Gives ions only when dissolved in water
Explanation:
An electrolyte gives ions only when dissolved in water.