MHT CET 2020 16th October Evening Shift | Electrochemistry Question 70 | Chemistry

A solution of $$\mathrm{CuSO}_4$$ is electrolysed using a current of 1.5 amperes for 10 minutes. What mass of Cu is deposited at cathode? [Atomic mass of $$\mathrm{Cu}=63.7$$]

0.637 g

0.297 g

0.150 g

0.395 g

MHT CET 2020 16th October Evening Shift

MCQ (Single Correct Answer)

-0

If resistivity of 0.8 M KCl solution is $$2.5 \times 10^{-3} \Omega \mathrm{~cm}$$. Calculate molar conductivity solution?

$$2 \times 10^5 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$5 \times 10^5 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$4 \times 10^5 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$3 \times 10^5 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

-0

How many electrons are involved in the reaction, when $$0.40 \mathrm{~F}$$ of electricity is passed through an electrolytic solution?

$$6.642 \times 10^{25}$$

$$1.505 \times 10^{24}$$

$$6.022 \times 10^{23}$$

$$2.4088 \times 10^{23}$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

-0

What will be the concentration of $$\mathrm{NaCl}$$ solution, if the molar conductivity and conductivity of $$\mathrm{NaCl}$$ solution is $$124.3 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$ and $$1.243 \times 10^{-4} \Omega^{-1} \mathrm{~cm}^2$$ respectively?

$$0.1 \mathrm{~mol} \mathrm{~L}^{-1}$$

$$0.001 \mathrm{~mol} \mathrm{~L}^{-1}$$

$$0.01 \mathrm{~mol} \mathrm{~L}^{-1}$$

$$0.02 \mathrm{~mol} \mathrm{~L}^{-1}$$

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