SATHEE: Some Basic Concepts Of Chemistry Question 280

Some Basic Concepts Of Chemistry Question 280

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 $K M n O_{4}$ during titration for complete oxidation. The weight of $K M n O_{4}$ present in one litre of the solution is [Tamilnadu CET 2002]

Options:

A) 3.476 g

B) 12.38 g

C) 34.76 g

D) 1.238 g

Show Answer

Answer:

Correct Answer: A

Solution:

$K M n O_{4}$ = Mohr salt $\frac{M_{1} V_{1}}{1} = \frac{M_{2} V_{2}}{5} = [\frac{W}{M \times V} \times 1000] \times \frac{V_{2}}{5}$ $[\frac{W \times 1000}{58 \times 1000}] \times 18$ $= \frac{3.92 \times 1000}{392 \times 1000} \times \frac{20}{5}$ W=3.476gm/L.

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Some Basic Concepts Of Chemistry Question 280

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 KMnO4 during titration for complete oxidation. The weight of KMnO4 present in one litre of the solution is [Tamilnadu CET 2002]

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 $K M n O_{4}$ during titration for complete oxidation. The weight of $K M n O_{4}$ present in one litre of the solution is [Tamilnadu CET 2002]