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The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is added to water, it conducts electricity. How will you explain this statement on the basis of ionisation and how is it affected by concentration of sodium chloride?
  • a)
    Both sugar and NaCl ionises completely in water thereby increasing the conductance
  • b)
    NaCl ionises completely in water and increase in concentration of salt increases conductance.
  • c)
    Both sugar and NaCl ionises partially in water thereby increasing the conductance
  • d)
    Sugar releases more ions in water and increases conductance
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The aqueous solution of sugar does not conduct electricity. However, w...
NaCl ionises completely in water and increase in concentration of salt increases conductance.
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The aqueous solution of sugar does not conduct electricity. However, w...
Explanation:

The statement can be explained on the basis of ionization and the effect of concentration of sodium chloride.

a) Both sugar and NaCl ionize completely in water thereby increasing the conductance:
This statement is incorrect because sugar does not ionize in water. Sugar is a covalent compound and its molecules do not dissociate into ions when dissolved in water. Therefore, the aqueous solution of sugar does not conduct electricity.

b) NaCl ionizes completely in water and an increase in the concentration of salt increases conductance:
This statement is correct. When sodium chloride (NaCl) is added to water, it dissociates into its constituent ions, sodium (Na+) and chloride (Cl-) ions. This process is called ionization. These ions are charged particles and can move freely in the solution, allowing the solution to conduct electricity. The higher the concentration of sodium chloride, the greater the number of ions present in the solution, and therefore, the higher the conductance of the solution.

c) Both sugar and NaCl ionize partially in water thereby increasing the conductance:
This statement is incorrect because sugar does not ionize in water. As mentioned earlier, sugar is a covalent compound and does not dissociate into ions in water. Therefore, it does not increase the conductance of the solution.

d) Sugar releases more ions in water and increases conductance:
This statement is incorrect because sugar does not release ions in water. It does not dissociate into ions and therefore, does not increase the conductance of the solution.

In conclusion, the correct explanation is option B - NaCl ionizes completely in water and an increase in the concentration of salt increases conductance.
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The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is added to water, it conducts electricity. How will you explain this statement on the basis of ionisation and how is it affected by concentration of sodium chloride?a)Both sugar and NaCl ionises completely in water thereby increasing the conductanceb)NaCl ionises completely in water and increase in concentration of salt increases conductance.c)Both sugar and NaCl ionises partially in water thereby increasing the conductanced)Sugar releases more ions in water and increases conductanceCorrect answer is option 'B'. Can you explain this answer?
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