Tag: introduction to electrolysis

Questions Related to introduction to electrolysis

What would happen if the electrodes were put in a saturated solution of glucose which is dissolved in water?

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

  1. Light bulb would glow

  2. Light bulb would remain dark

  3. Apparatus would combust

  4. Glucose molecules would dissociate

  5. None of the above

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Correct Option: B
Explanation:

If the electrodes were put in a saturated solution of glucose which is dissolved in water, light bulb would remain dark.
This indicates that no electricity is passing through aqueous glucose solution.
Glucose is a non electrolyte. Hence, in aqueous solution of glucose, no ions are present. Hence, it cannot conduct electricity.

Which of the following can be classified as a strong electrolyte?

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

  1. $\displaystyle { Br } _{ 2 }$

  2. $\displaystyle { C } _{ 6 }{ H } _{ 12 }{ O } _{ 6 }$

  3. $\displaystyle Ca{ Cl } _{ 2 }$

  4. $\displaystyle { H } _{ 2 }O$

  5. $\displaystyle N{ O } _{ 3 }$

Show answer
Correct Option: C
Explanation:

Option C is the correct answer.

$CaCl _2$ in aqueous solution dissociates to give one $Ca^{2+}$ and two $Cl^-$ ions.
Any substance which dissociates to form ions can be termed as an electrolyte.
Here Calcium Chloride gives one ion of Calcium and two Chloride ions. That is, from $CaCl _2$ a total of three ions are formed. Hence it can be classified as a strong electrolyte. The strong electrolytes dissociate completely in the solution. Here only $CaCl _2$ is the only compound which completely dissociates.

What is an electrolyte?

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

  1. Electrolytes are substances that dissolve by separating into ions in solution.

  2. Electrolytes are substances that do not conduct electricity but dissolve in water.

  3. Electrolytes are substances that have covalent bonds.

  4. Electrolytes are substances that share electrons.

Show answer
Correct Option: A
Explanation:

Electrolyte is an substance that dissolve by separating into ions in solution . They even can conduct electricity. As their ions are free to carry current.

Two solutions of X and Y electrolytes are taken in two beakers and diluted by adding $500$ mL of water. $\Lambda _m$ of X increases by $1.5$ times while that of Y increases by $20$ times, what could be the electrolytes X and Y?

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

  1. $X\rightarrow NaCl, Y\rightarrow KCl$

  2. $X\rightarrow NaCl, Y\rightarrow CH _3COOH$

  3. $X\rightarrow KOH, Y\rightarrow NaOH$

  4. $X\rightarrow CH _3COOH, Y\rightarrow NaCl$

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Correct Option: B
Explanation:

On dilution, the molar conductivity of X increases by 1.5 times and Y by 20 times. Hence, X is a strong electrolyte and Y is a weak electrolyte.


Hence, option B is correct.

The substances whose aqueous solutions conduct electricity are called : 

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

  1. electrolytes

  2. non-electrolytes

  3. conductors

  4. metals

Show answer
Correct Option: A
Explanation:

The substances whose aqueous solutions conduct electricity are called electrolytes.