Electrolysis of Water

Q. The ratio of the volumes of hydrogen and oxygen obtained on electrolysis of water is ____.

1. 1:2
2. 2:1
3. 4:3
4. 1:3

Q.

Why do acids, bases and salt conduct electricity?

Q.

if electrons are getting added to an element Y; then: i) is Y getting oxidized or reduced, ii) what charge will Y migrate to during the process of electrolysis?

Q. Which of the following solution do not conduct electricity?

1. Sodium chloride
2. Copper sulphate
3. Potassium bromide
4. Distilled water

Q.

The characteristics of cathode rays do not depend upon material of electrodes.

1. False

2. True

Q. Which gas is evolved at the anode during electrolysis of water?

1. Hydrogen
2. Nitrogen dioxide
3. Sulphur dioxide
4. Oxygen

Q.

Explain the construction and working of dry cell.

Q.

The electrode that is connected to the positive terminal of the battery is called______.

1. Anode.

2. Cathode

3. Electrolyte

4. All Of These

Q.

Big procedure on Activity Decomposition reaction

Q.

The solution of a substance that conducts electricity is called ___________

1. 
   

   an electrolyte

2. 
   

   an insulator

3. 
   

   a conductor

4. 
   

   none of these

Q.

During the electrolysis of sodium chloride solution, how many electrons are lost by each chloride ion?

1. 1
2. 2
3. 3
4. 4

Q.

In the electrolysis of water what would happen if dil ${\mathrm{H}}_2{\mathrm{SO}}_4$is not added to the water?

Q. Formal charge , Lewis structure for carbonate ion

Q. During the electrolysis of copper sulphate aqueous solution using copper electrode, the reaction taking place at the cathode is:

1. $Cu⟶{Cu}_{\left(aq\right)}^{2+}+2e^{-}$
2. ${Cu}_{\left(aq\right)}^{2+}+2e^{-}⟶{Cu}_{\left(s\right)}$
3. $H_{\left(aq\right)}^{+}+e^{-}⟶\frac{1}{2}{H}_{2_{\left(g\right)}}$
4. ${SO}_{4\left(aq\right)}^{2-}⟶{SO}_{3_{\left(g\right)}}+\frac{1}{2}{O}_{2_{\left(g\right)}}+2e^{-}$

Q. In electrorefining, the impure metal is made.

1. Anode
2. Anode or cathode
3. Electrolyte
4. Cathode

Q. Shown below is the electrolysis of water. Identify the electrode in which hydrogen gas will be collected.

1. 
2. 
3. 

Q.

Write down separate equations for the reactions which take place at the two platinum electrodes when dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$, which is electrolysed.

Q. Choose the correct statement regarding electrolysis of water from the options given below.

1. The gas released at anode is hydrogen.
2. The gas liberated at cathode is double the volume of gas liberated at the anode.
3. The gas liberated at cathode is half the volume of gas liberated at the anode.
4. The gas released at cathode is oxygen.

Q. Which of the following represents the anode half-cell reaction for the following galvanic cell: $Cu\left(s\right)|C{u}^{2+}\left(aq\right)||A{g}^{+}\left(aq\right)|Ag\left(s\right)$

1. 
2. 
3. 
4. 

Q.

An electrolytic cell is set up using two platinum electrodes and an aqueous solution of copper[II] sulphate. write the equation for the reaction at anode

Q. Upon electrolysis of 2 litres of pure water, litre(s) of $O_2$ gas is/are liberated.

1. 1
2. 2
3. 3

Q. The products obtained at cathode and anode on electrolysis of aqueous sodium succinate are :

1. anode : ethene + $C{O}_2$, cathode : $H_2$
2. anode : ethyne + $C{O}_2$, cathode : $H_2$
3. anode : ethyne + $H_2$, cathode : Na
4. anode : ethyne + $C{O}_2$, cathode : Na

Q. In Castner-Kellner cell for the manufacturer of NaOH (caustic soda) _______ acts as cathode as well as anode.

1. graphite
2. Cu
3. Hg
4. Zn

Q.

Two metal rods A, B are dipped in their ionic solutions respectively. Following reaction occurs at each electrode:
$A\to A^{2+}+2e^{-}{B}^{2+}+2e^{-}\to B$
Which rod will acquire negative charge?

1. A

2. B

3. Both A and B

4. Neither A nor B.

Q. Assertion :Anode is the electrode at which oxidation occurs and cathode is the electrode at which reduction occurs. Reason: Anode and cathode in electrochemical cells and electrolytic cells have opposite polarity.

1. Both assertion and reason are correct and reason is the correct explanation for assertion
2. Both assertion and reason are correct but reason is not the correct explanation for assertion
3. Assertion is correct but reason is incorrect
4. Assertion is incorrect but reason is correct

Q. volume of gas evolved at anode when CuSO4(aq.) is electrolyzed by using 2F electricity at STP will be?

Q. In the rusting of Iron, which of the following reaction occurs at cathode?

1. $F{e}^{2+}|Fe$
2. $O_2|H_{2}O$
3. $F{e}^{3+}|F{e}^{2+}$
4. $Fe|F{e}^{3+}$

Q. The electrode that is connected to the positive terminal of the battery is called :

1. cathode.
2. anode.
3. both A and B.
4. electrolyte.

Q.

Identify A and B in the given schematic diagram of a galvanic cell.

1. A - $Fe$ and B- $CuS{O}_4$
2. A - $Zn$ and B- $ZnS{O}_4$
3. A - $Zn$ and B- $FeS{O}_4$
4. A - $Fe$ and B- $ZnS{O}_4$

Q.

The solution of a substance that conducts electricity is called ___________

1. 
   

   an electrolyte

2. 
   

   an insulator

3. 
   

   a conductor

4. 
   

   none of these