NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 1135 - 1139 of 1259

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Question number: 1135

» Solutions » Determine Molecular Mass Using Colligative Properties

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MCQ▾

Question

A 5 % solution of cane sugar is isotonic with 0.877 % solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is 342?

Choices

Choice (4)Response

a.

39.20

b.

60.26

c.

22.34

d.

59.98

Question number: 1136

» Solutions » Elevation of Boiling Point

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MCQ▾

Question

1.355g of substance dissolved in 55 g of produced a depression in the frecting point of Calculate the molecular weight of substance

Choices

Choice (4)Response

a.

153.47

b.

15.347

c.

15.420

d.

1.530

Question number: 1137

» Solutions » Osmotic Pressure

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MCQ▾

Question

What is the temperature at which 10 % aqueous solution of glucose will exhibit the osmotic pressure of 16.4 atm? (R = 0.082

Choices

Choice (4)Response

a.

90 k

b.

300 k

c.

180 k

d.

360 k

Question number: 1138

» Solutions » Elevation of Boiling Point

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MCQ▾

Question

A solution of 2.5g of a non-volatile solid in 100g benzene is boiled at higher than the boiling point of pure benzene. Calculate the molecular mass of substance. Molal elevation constant of benzene is 2.67 k kg ?

Choices

Choice (4)Response

a.

138.9

b.

158.9

c.

148.9

d.

168.9

Question number: 1139

» Solutions » Depression of Freezing Point

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MCQ▾

Question

On dissolving 0.25g of a non-volatile substance in 30ml benzene (density 0.8g/ml) its freezing point decrease by . Calculate the molecular mass of non-volatile substance

Choices

Choice (4)Response

a.

134.3

b.

143.2

c.

131.4

d.

133.3

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