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Q.

Statement I : One litre of water at 4⁰C contains 55.5 N molecules
Statement II : Density of water at 4⁰C is 1 g/ml and 18g of water represents one mole.

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a

Statement I is incorrect and statement II is correct

b

Statement - I is correct and statement - II is incorrect

c

Statements I and II are correct

d

Statements I and II are incorrect

answer is A.

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Detailed Solution

I) At 4°C density of water = 1g/cc

$\therefore$ 1000ml water = 1000g water

18grams H₂O contain N_A molecules

1000grams H₂O contain 'X' molecules

X = 55.55N_A

$\therefore$ Statement I is correct.

II) At 4°C dencity of water is 1g/cc

$\therefore$ 18ml = 18g = 1mole of H₂O

$\therefore$ Statement II is correct.

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Statement I : One litre of water at 40C contains 55.5 N moleculesStatement II : Density of water at 40C is 1 g/ml and 18g of water represents one mole.