Tag: electrical conductivity of liquids

Questions Related to electrical conductivity of liquids

When electric current passes through the filaments of a bulb, it starts emitting light due to :

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. heating effect of electric current.

  2. magnetic effect of electric current.

  3. chemical effect of electric current.

  4. lighting effect of electric current.

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Correct Option: A
Explanation:

When electric current passes through the filaments of bulb, it starts emitting light due to heating effect of electric current.

The chemical effect produced by an electric current depends on:

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. the nature of electrode

  2. the tester

  3. the conducting solution

  4. none of the above

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Correct Option: C
Explanation:

Because if the liquid is conducting i.e electrolyte only then free ions will be present . Only in that case electric current will be able to produce chemical effect otherwise not.

Sea water is a good conductor of electricity but distilled water is not because :

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. sea water contains mineral salts.

  2. distilled water contains mineral.

  3. both A and B

  4. none of the above

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Correct Option: A
Explanation:

Sea water is a good conductor of electricity but distilled water is not because sea water contains mineral salts.

A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dim for liquid B. You would conclude that :

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. liquid $A$ is a better conductor than liquid$ B$

  2. liquid $B$ is a better conductor than liquid $A$

  3. both liquids are equally conducting

  4. conducting properties of liquid cannot be compared in this manner.

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Correct Option: A
Explanation:

Liquid $A$ is a better conductor than liquid $B.$

$H _2SO _4$ solution attached to a bulb in a beaker:

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. cannot light the bulb

  2. can light the bulb

  3. diffuses the bulb

  4. none of above

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Correct Option: B
Explanation:

An acid in aqueous medium releases hydronium ions. Hence, it is able to conduct electricity. When sulphuric acid in aqueous medium is attached to a bulb in a beaker, current flows through it and lights the bulb.

The specific charge of electrons is less than the specific charge of protons.

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. True

  2. False

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Correct Option: B
Explanation:

The specific charge of a particle is the charge that it carries per unit mass,i.e,


$q _m=\dfrac{q}{m}$

A proton and an electron carries the same magnitude of charge($q$) their specific charge is inversely proportional to their mass,i.e,

$q _m\propto\dfrac{1}{m}$

The mass of a proton is greater than that of an electron and hence

$q _{m _p}<q _{m _e}$

Hence, the above statement is incorrect

Statement 1:  A solution of NaCI will conduct electricity. 
Statement 2:  NaCI will not form ions in solution. 

physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

  2. Both the Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

  3. Statement 1 is correct but Statement 2 is not correct.

  4. Statement 1 is not correct but Statement 2 is correct.

  5. Both the Statement 1 and Statement 2 are not correct.

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Correct Option: C
Explanation:

A solution of $NaCl$ conduct electricity because in aqueous solution $NaCl$ dissociate into $Na^+$ and $Cl^-$ ions, which in solution are free to move and hence, conduct electricity.

Assertion: Zinc is coated on the iron to prevent corrosion in a process called galvanization.
Reason: Zinc is a stronger reducing agent than iron and is more easily oxidized than iron.
chemistry electrical conductivity of liquids effects of oxidation reactions in daily life corrosion of metals electroplating and its application

  1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion

  2. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

  3. Assertion is true but Reason is false

  4. Assertion is false but Reason is true

  5. Both Assertion and Reason are false

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Correct Option: A
Explanation:

Coating of iron with zinc to prevent corrosion is called galvanization.
Steel is dipped in a bath of molten zinc. The zinc coated iron is called galvanized iron. Zinc $(E^o=-0.763 : V)$ is stringer reducing agent than iron $(E^o=-0.44 : V)$ and is more easily oxidized than iron . Thus during corrosion, Zn is oxidized instead of Fe.