330019
Assertion : The conductivity of metals decreases with increase of temperature whereas that of electrolytic solution increases. Reason : Electrons in metals are very tightly held by the nucleus and are not free to move.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In materials, electrons can move freely, but the vibrations of atomic nuclei, known as lattice vibrations, hinder their smooth flow, causing electrical resistance. So option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330020
Which of the following is not a non-electrolyte?
1 Acetic acid
2 Glucose
3 Ethanol
4 Urea
Explanation:
The substance whose aqueous solution allows the passage of electric current and is chemically decomposed, is termed as electrolyte. Electrolytic substances are classified as strong or weak, according to acid base concept. Acetic acid is a weak electrolyte while glucose, ethanol and urea are non-electrolytes.
CHXII03:ELECTROCHEMISTRY
330021
Statement A : Electrical conductivity of copper decreases with increase in temperature. Statement B : The electrical conductivity of metals is due to motion of electrons.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Electrical conductivity of every metal decreases with increase in temperature due to increase in molecular motion which increases resistance. So, the option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330022
Identify the factor from the following that does not affect electrolytic conductance of a solution.
1 Concentration of the electrolyte.
2 The nature of the electrode used.
3 The nature of the electrolyte added.
4 The nature of solvent used.
Explanation:
The conductivity of electrolytic (ionic) solutions depends on (i) the nature of the electrolyte added (ii) concentration of the electrolyte (iii) the nature of the solvent and its viscosity (iv) size of the ions produced and their solvation (v) temperature (it increases with the increase of temperature). It does not depend on the electrode used. So, the correct option is (2).
330019
Assertion : The conductivity of metals decreases with increase of temperature whereas that of electrolytic solution increases. Reason : Electrons in metals are very tightly held by the nucleus and are not free to move.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In materials, electrons can move freely, but the vibrations of atomic nuclei, known as lattice vibrations, hinder their smooth flow, causing electrical resistance. So option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330020
Which of the following is not a non-electrolyte?
1 Acetic acid
2 Glucose
3 Ethanol
4 Urea
Explanation:
The substance whose aqueous solution allows the passage of electric current and is chemically decomposed, is termed as electrolyte. Electrolytic substances are classified as strong or weak, according to acid base concept. Acetic acid is a weak electrolyte while glucose, ethanol and urea are non-electrolytes.
CHXII03:ELECTROCHEMISTRY
330021
Statement A : Electrical conductivity of copper decreases with increase in temperature. Statement B : The electrical conductivity of metals is due to motion of electrons.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Electrical conductivity of every metal decreases with increase in temperature due to increase in molecular motion which increases resistance. So, the option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330022
Identify the factor from the following that does not affect electrolytic conductance of a solution.
1 Concentration of the electrolyte.
2 The nature of the electrode used.
3 The nature of the electrolyte added.
4 The nature of solvent used.
Explanation:
The conductivity of electrolytic (ionic) solutions depends on (i) the nature of the electrolyte added (ii) concentration of the electrolyte (iii) the nature of the solvent and its viscosity (iv) size of the ions produced and their solvation (v) temperature (it increases with the increase of temperature). It does not depend on the electrode used. So, the correct option is (2).
330019
Assertion : The conductivity of metals decreases with increase of temperature whereas that of electrolytic solution increases. Reason : Electrons in metals are very tightly held by the nucleus and are not free to move.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In materials, electrons can move freely, but the vibrations of atomic nuclei, known as lattice vibrations, hinder their smooth flow, causing electrical resistance. So option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330020
Which of the following is not a non-electrolyte?
1 Acetic acid
2 Glucose
3 Ethanol
4 Urea
Explanation:
The substance whose aqueous solution allows the passage of electric current and is chemically decomposed, is termed as electrolyte. Electrolytic substances are classified as strong or weak, according to acid base concept. Acetic acid is a weak electrolyte while glucose, ethanol and urea are non-electrolytes.
CHXII03:ELECTROCHEMISTRY
330021
Statement A : Electrical conductivity of copper decreases with increase in temperature. Statement B : The electrical conductivity of metals is due to motion of electrons.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Electrical conductivity of every metal decreases with increase in temperature due to increase in molecular motion which increases resistance. So, the option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330022
Identify the factor from the following that does not affect electrolytic conductance of a solution.
1 Concentration of the electrolyte.
2 The nature of the electrode used.
3 The nature of the electrolyte added.
4 The nature of solvent used.
Explanation:
The conductivity of electrolytic (ionic) solutions depends on (i) the nature of the electrolyte added (ii) concentration of the electrolyte (iii) the nature of the solvent and its viscosity (iv) size of the ions produced and their solvation (v) temperature (it increases with the increase of temperature). It does not depend on the electrode used. So, the correct option is (2).
330019
Assertion : The conductivity of metals decreases with increase of temperature whereas that of electrolytic solution increases. Reason : Electrons in metals are very tightly held by the nucleus and are not free to move.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In materials, electrons can move freely, but the vibrations of atomic nuclei, known as lattice vibrations, hinder their smooth flow, causing electrical resistance. So option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330020
Which of the following is not a non-electrolyte?
1 Acetic acid
2 Glucose
3 Ethanol
4 Urea
Explanation:
The substance whose aqueous solution allows the passage of electric current and is chemically decomposed, is termed as electrolyte. Electrolytic substances are classified as strong or weak, according to acid base concept. Acetic acid is a weak electrolyte while glucose, ethanol and urea are non-electrolytes.
CHXII03:ELECTROCHEMISTRY
330021
Statement A : Electrical conductivity of copper decreases with increase in temperature. Statement B : The electrical conductivity of metals is due to motion of electrons.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Electrical conductivity of every metal decreases with increase in temperature due to increase in molecular motion which increases resistance. So, the option (3) is correct.
CHXII03:ELECTROCHEMISTRY
330022
Identify the factor from the following that does not affect electrolytic conductance of a solution.
1 Concentration of the electrolyte.
2 The nature of the electrode used.
3 The nature of the electrolyte added.
4 The nature of solvent used.
Explanation:
The conductivity of electrolytic (ionic) solutions depends on (i) the nature of the electrolyte added (ii) concentration of the electrolyte (iii) the nature of the solvent and its viscosity (iv) size of the ions produced and their solvation (v) temperature (it increases with the increase of temperature). It does not depend on the electrode used. So, the correct option is (2).
