Chemistry · JEE

Electrolytic and metallic conduction, conductance in electrolytic solutions, molar conductivities and their variation with concentration, Kohlrausch's law and its applications Mock Test for JEE

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Syllabus context

Part of Redox Reactions and Electrochemistry in JEE Main Chemistry.

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Q1ChemistryUnit 7: Redox Reactions and Electrochemistry

One drop of methyl orange solution when added to the solution obtained after electrolysis of a concentrated solution of NaCl with Pt electrodes, the colour of the solution will turn:

Q2ChemistryUnit 7: Redox Reactions and Electrochemistry

A chemist wants to produce

C l_{2}(g)

from molten

N a C l .

How many grams could be produced if he uses a steady current of 2 ampere for 2.5 minutes :-

Q3ChemistryUnit 7: Redox Reactions and Electrochemistry

The volume of gases evolved at

S T P

by passing

0.1 A

of current for

965 g

through an aqueous solution of potassium acetate:

Q4ChemistryUnit 7: Redox Reactions and Electrochemistry

A certain current liberated 0.504 g of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in copper sulphate solution?

Q5ChemistryUnit 7: Redox Reactions and Electrochemistry

On passing a current through a molten aluminium chloride for some time produced 11.28 lit of

C l_{2}

\mathrm{NTP}

at anode. The quantity of aluminium deposited at cathode is:

Q6ChemistryUnit 7: Redox Reactions and Electrochemistry

The resistance of

1 \mathrm{N}

solution of acetic acid is

250 \Omega

when measured in a cell having a cell constant of

1.15 \mathrm{cm}^{-1} .

The equivalent conduction (in oh

m^{-1} c m^{2} e q u i v^{-1}

) of

1 N

acetic acid is

Q7ChemistryUnit 7: Redox Reactions and Electrochemistry

The weight of silver (At. Wt. = 108) displaced by a quantity of electricity which displaces

5600 \mathrm{ml}

O_{2}

at STP will be

Q8ChemistryUnit 7: Redox Reactions and Electrochemistry

When the power delivered by a 100 volt battery is 40 watts, the equivalent resistance of the circuit is:

Q9ChemistryUnit 7: Redox Reactions and Electrochemistry

Assertion

N a C l

is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state. Reason In solid

N a C l,

the ions have fixed positions in the lattice structure and there are no free ions but in aqueous solution or molten state, the ions can move freely and thus conduct electricity.

Q10ChemistryUnit 7: Redox Reactions and Electrochemistry

Which of the following is one of the most common application of chemical effects of electric current?

Q11ChemistryUnit 7: Redox Reactions and Electrochemistry

The specific conductance of a

0.1 N K C l

solution at

23^{\circ} C

is 0.0112 oh

m^{-1} c m^{-1} .

The resistance of the cell containing the solution at the same temperature was found to be

\mathbf{5 5}

ohm. The cell constant will be:

Q12ChemistryUnit 7: Redox Reactions and Electrochemistry

During electrolysis of fused calcium hydride, the hydrogen is produced at:

Q13ChemistryUnit 7: Redox Reactions and Electrochemistry

Internal resistance of a battery cell decreases with:

Q14ChemistryUnit 7: Redox Reactions and Electrochemistry

1 L of a solution containing 10 g of

C u S O_{4}

is to be electroyzed by a current strength of 48.25 A for 200 s. The weight of the final solution and pH of the solution at the end of electrolysis are : (assume that the volume remains constant during electrolysis)

Q15ChemistryUnit 7: Redox Reactions and Electrochemistry

Electrolysis of fused

K C l . M g C l_{2}

gives:

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