Solutions Test

Result

Solutions Test - 49

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Weekly Quiz Competition

Question 1
4 / -1

Decrease in Freezing point of 75.2 gm phenol when dissolved in a solvent having kf = 14 k. kg. mole-1. is 7 k. Calculate the percentage of association of phenol if it is forms a dime in the solution.

A
62.5 %

B
80.5 %

C
70 %

D
75 %
Question 2
4 / -1

Which of the following is correct option when kcl is dissolved in H₂O. ?

A
ΔH = +ve, ΔS = +ve, ΔG = +ve

B
ΔH = +ve, ΔS = –ve, ΔG = –ve

C
ΔH = +ve, ΔS = +ve, ΔG = –ve

D
ΔH = –ve, ΔS = –ve, ΔG = +ve
Question 3
4 / -1

Naphthalene is soluble in ether or benzene because. ?

A
dipole-dipole attraction is equal

B
London forces are equal

C
Hydrogen bond

D
Ionic attraction
Question 4
4 / -1

Four Liquids are given.
(i) Water : more polar and capacity to torm H-bond.
(ii) Hexanol : moderately polar and partial capacity to form H-bond.
(iii) Chloro form : moderately polar and does not capable to form H-bond.
(iv) Octane : non polar and does not capable to form H-bond.
which of the following pair of liquids mixed with each other in very less proportion.

A
I, IV

B
I, II

C
II, III

D
III, IV
Question 5
4 / -1

Which of the following is applicable for the solubility of gases in liquid.

A
Increases with increase in temperature and pressure

B
decreases with increase in temp and pressure

C
Increases with decrease in temp and increase in pressure

D
Decreases with decrease in temp and increase in pressure
Question 6
4 / -1

Concentration of lead metal in a blood of any person is more than that of 10 micro gram. dm^-1, than that person is considered as on effect of poison section. Then calculate its concentration in ppb (parts per billion)

A
1

B
10

C
100

D
1000
Question 7
4 / -1

A
60, 90

B
40, 40

C
40, 10

D
10, 40
Question 8
4 / -1

Decrease in vapour pressure of an aqueous solution. of an electrolyte is 4% what would be the percentage increase in elevation in Boiling point ? (k_b = 0.512 k. kg. mol^–1)

A
0.55 %

B
0.02 %

C
5.5 %

D
2 %
Question 9
4 / -1

For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is 2° C . Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take K_b = 0.76 K kg mol^-1)

A
724

B
740

C
736

D
718

Solution
Question 10
4 / -1

Molarity (x) and normality (y) of a solution are related to each other as (M = Molecular mass, E = Equivalent weight)

A

B

C

D

Solution