PrepBharat

1. Which of the following is not correct for ideal solution?
a) \[\triangle S_{mixing}=0\]
b) \[\triangle V_{mixing}=0\]
c) \[\triangle H_{mixing}=0\]
d) It obeys Raoult's law

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Answer: a
Explanation:

2. Which of the following does not show positive deviation from Raoult's law?
a) Benzene-Chloroform
b) Benzene-Acetone
c) Benzene-Ethanol
d) Benzene-Carbon tetrachloride

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3. Identify the mixture that shows positive deviation from Raoult's law
a) \[CHCl_{3}+\left(CH_{3}\right)_{2}CO\]
b) \[\left(CH_{3}\right)_{2}CO+C_{6}H_{5}NH_{2}\]
c) \[CHCl_{3}+C_{6}H_{6}\]
d) \[\left(CH_{3}\right)_{2}CO+CS_{2}\]

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4. Azeotropic mixture of HCl and \[H_{2}O\]   has
a) 48% HCl
b) 22.2% HC
c) 36% HCl
d) 20.2% HCl

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5. Which of the following is not a colligative property?
a) Depression in freezing point
b) Elevation of boiling point
c) Osmotic pressure
d) Modification of refractive index

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6. Which of the following is a colligative property?
a) Change in free energy
b) Change in pressure
c) Heat of vapourisation
d) Osmotic pressure

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7. Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greatest precision?
a) Depression in freezing point
b) Osmotic pressure
c) Relative lowering of vapour pressure
d) Elevation of boiling point

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8. Isotonic solutions have same
a) molar concentration
b) molality
c) normality
d) None of these

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9. When mango is placed in dilute aqueous solution of hydrochloric acid, it
a) shrinks
b) swells
c) bursts
d) Nothing happens

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10.As a result of osmosis, the volume of the solution
a) gradually decreases
b) gradually increases
c) is not affected
d) Any of the three

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