SATHEE: Some Basic Concepts Of Chemistry Question 63

Some Basic Concepts Of Chemistry Question 63

Question: 3.92 g of ferrous ammonium sulphate crystals are dissolved in 100 mL of water. 20 mL of this solution requires 18 mL of potassium permaganate during titration for complete oxidation. The weight of $K M n O_{4}$ present in one litre of the solution of

Options:

A) 3.47 g

B) 12.38 g

C) 1.23 g

D) 34.76 g

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Answer:

Correct Answer: A

Solution:

[a] Normality of ferrous amm sulphate $= \frac{3.92 \times 1000}{392 \times 100} = 0.1$ (Eq. wt of FAS is 392)

$M_{1} V_{1} = M_{2} V_{2}$ $20 \times 0.1 = 18 \times N_{2}$

$N_{2} = 0.111$ 1 g ev. of $K M n O_{4} = 31.6 g$ 0.111 g ev. of $K M n O_{4} = 31.6 \times 0.111 = 3.5 g .$

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Some Basic Concepts Of Chemistry Question 63

Question: 3.92 g of ferrous ammonium sulphate crystals are dissolved in 100 mL of water. 20 mL of this solution requires 18 mL of potassium permaganate during titration for complete oxidation. The weight of KMnO4 present in one litre of the solution of

Options:

Answer:

Solution:

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Question: 3.92 g of ferrous ammonium sulphate crystals are dissolved in 100 mL of water. 20 mL of this solution requires 18 mL of potassium permaganate during titration for complete oxidation. The weight of $K M n O_{4}$ present in one litre of the solution of