Tag: electrolysis

Questions Related to electrolysis

Which of the following is not a strong electrolytes ?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. $NaCl$

  2. $KNO _3$

  3. $NH _4OH$

  4. $FeSO _4$

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Correct Option: C
Explanation:
Here ${ NH } _{ 4 }OH$ is not a strong electrolyte because it doesn't dissociates completely.
$\rightarrow$  $\therefore$   ${ NH } _{ 4 }OH$ is a weak electrolyte.
Ans :- Option $C$.

A non-electronic conductor is :

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. Iron

  2. Gas carbon

  3. Copper sulphate

  4. Mercury

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Correct Option: B
Explanation:

Here iron, copper sulphate and mercury are electronic conductors since they permit the flow electric charge with the application of voltage. 


But gas-carbon is non-electronic conductor.

Therefore, option B is correct.

In 0.5 M ${ NH } _{ 3 }$ solution the pH is 11.21 and the per cent dissociation of ammonia in a solution that is 0.15 M ${ NH } _{ 3 }$ and 0.45 M ${ NH } _{ 4 }Cl$ is

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. 68%

  2. 36%

  3. $4\times { 10 }^{ -3 }%$

  4. $4\times { 10 }^{ -5 }%$

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Correct Option: B

The equivalent conductance at infinite dilution of an acid like HF

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. Can be determined by extrapolation of measurements of dilute solutions of HCI, HBr and HI

  2. Can be determined by measurement of very dilute HF solution

  3. Can best be determined from measurements of concentrated solutions of NaF, NaCI and HCI

  4. Can best be determined from measurements of dilute solutions of NaF, NaCI and HCI.

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Correct Option: D
Explanation:

The equivalent conductance at infinite dilution of an acid like $HF$ can best be determined from measurement of dilute solution of $NaF,NaCl,HCl$ because these have ionic character.

Consider a $0.1M$ solution of two solutes $A$ and $B$. $A$ behaves as a non-electrolyte while $80\%$ of $B$ dimerises. Which of the following statement is correct regarding these solutions?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. The b.pt of $A$ will be less than $B$

  2. The osomotic pressure of $B$ will be more than thatof $A$

  3. The freezing point of solution $A$ will be less than that of $B$

  4. Boiling points of both solutions will be same.

Show answer
Correct Option: B
Explanation:

Correct option (b) The osmotic pressure of B will be more than that of A 

 Explanation: The concentration of electrolyte, which ionises in water shall be more although 80% of it dimerises 

In which of the following electrolysis, the composition of electrolyte is expected to remain constant under optimum conditions:

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. Aq. AgNO$ _{3}$ solution between Ag electrodes

  2. Aq. CuSO$ _{4}$ solution between Pt electrodes

  3. Fused NaCl between Pt electrodes

  4. Aqueous AgNO$ _{3}$ solution between Pt electrodes

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Correct Option: A
Explanation:

In case of Aq.  $AgNO _3$  with Ag electrodes, metal from anode goes to the solution and metal from solution goes to the cathode, hence the composition of electrolyte does not change with time and remain constant.

Hence. option A is correct.

Which of the following will form the cathode with respect to iron anond in an electrolytic cell ?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. Mg

  2. Al

  3. Cu

  4. Zn

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Correct Option: C

For a dilute solution of a strong electrolyte, which of the following facts is correct ?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. The graph b/w $ \lambda m $ and $C$ is linear

  2. The graph b/w log $ \lambda m $ and $C$ is linear

  3. The graph b/w $ \lambda m $ and $ \sqrt {C} $ is linear

  4. The graph b/w $ \lambda m $ and $ \sqrt {C} $ has a negative slope.

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Correct Option: A

Which of the following is not an electrolyte?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. Sulphuric acid

  2. Lemon juice

  3. Tamarind juice

  4. Detergent solution

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Correct Option: D

The term used for a liquid or solution, which conducts electricity with accompanying chemical change are :

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. electrolytes

  2. electrodes

  3. anodes

  4. cathodes

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Correct Option: A
Explanation:

An electrolyte is a substance that ionizes when dissolved in suitable ionizing solvents such as water. This includes most soluble salts, acids, and bases.