AP EAPCET 2021 - 19th August Evening Shift | Electrochemistry Question 7 | Chemistry

For $$\mathrm{C{r_2}O_7^{2 - } + 14{H^ + } + 6{e^ - }\buildrel {Yields} \over \longrightarrow 2C{r^{3 + }} + 7{H_2}O,{E^\Upsilon } = 1.33}$$ V at $$[C{r_2}O_7^{2 - }] = 4.5$$ millimole, $$[C{r^{3 + }}] = 1.5$$ millimole and $$E = 1.067$$ V, then calculate the pH of the solution.

2.5

1.5

AP EAPCET 2021 - 19th August Morning Shift

MCQ (Single Correct Answer)

-0

Assertion (A) Sodium acetate on Kolbe’s electrolysis gives ethane.

Reason (R) Methyl free radical is formed at cathode.

Both A and R are true and R is a correct explanation of A.

Both A and R are true but R is not a correct explanation of A.

A is true but R is false.

A is false but R is true.

AP EAPCET 2021 - 19th August Morning Shift

MCQ (Single Correct Answer)

-0

When a current of 10 A is passes through molten AlCl$$_3$$ for 1.608 minutes. The mass of Al deposited will be

[Atomic mass of Al = 27 g]

0.09 g

0.81 g

1.35 g

0.27 g

AP EAPCET 2021 - 19th August Morning Shift

MCQ (Single Correct Answer)

-0

The molar conductivities $$\left(\lambda_{\mathrm{m}}^{\Upsilon}\right)$$ at infinite dilution of $$\mathrm{KBr}, \mathrm{HBr}$$ and $$\mathrm{KNH}_2$$ are 120.5, 420.6 and $$90.48 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$ respectively. Find the value of $$\lambda_{\mathrm{m}}^\Upsilon$$ for $$\mathrm{NH}_3$$.

$$511.0 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$390.5 \mathrm{~s} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$256.2 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

$$240.9 \mathrm{~s} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$

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