Solutions Test

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Solutions Test - 47

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Weekly Quiz Competition

Question 1
4 / -1

90 gm glucose and 120 gm urea dissolved in 1.46 kg aqueous solution, then what will be the boiling point of the solution at 1 bar pressure ? (Kb = 0.512^o C -kg – mole^-1, molecular weight of glucose and urea are 180 and 60 gm/mole respectively)

A
100.876^oC

B
101.024^oC

C
100.248^oC

D
100.007^oC

Solution
Question 2
4 / -1

pH of 0.2M dibasic acid H₂A is 1.699; then, what will be its osmotic pressure at T K temperature ?

A
0.22 RT

B
0.02 RT

C
0.4 RT

D
0.1 RT

Solution
Question 3
4 / -1

Boiling point of an aqueous soultion of 0.4m AlCl₃ is 100.7_oC; then what would be the pressure of ionization of AlCl₃ ? Kb – 0.512^o C - kg - mole^-1.

A
80.67%

B
60.5%

C
76.54%

D
84.75%
Question 4
4 / -1

The vapour pressure of homogenous mixture of 10 mole of liquid X and 30 mole of liquid Y at constant temperature is 550 mm. In this solution, 10 mole of liquid Y increases, hence, increase in vapour pressure is 10 mm. Then, find the vapor pressure of pure liquid X and Y at that temperature.

A
P^ox = 200 mm, Poy = 500 mm

B
P^ox = 400 mm, Poy = 600 mm

C
P^ox = 600 mm, Poy = 300 mm

D
P^ox = 350 mm, Poy = 500 mm

Solution
Question 5
4 / -1

What amount of urea dissolved in 1 kg water at constant temperature, so that vapour pressure of the solution reduced by 2% ? ( M.W of urea = 60 gm/mole)

A
68 gm

B
60 gm

C
50 gm

D
75 gm
Question 6
4 / -1

What would be tne volume of 15% w/v and 5% w/v NaOH solution required to prepare 1 litre aqueous solution of 2M NaOH ? (M.w of Naoh = 40 gram/mole)

A
300 ml, 700ml

B
250 ml, 750ml

C
400 ml, 600ml

D
280 ml, 720ml

Solution
Question 7
4 / -1

At constant temperature, vapour pressure of an aqueous solution of 1.5 kg glucose decreases to 0.98% in comparision with vapour pressure of pure water then, what quantity of glucose in gram dissolved in the solution ? (Molecular weight of glucose = 180 gm/mole)

A
148.5 gm

B
14.85 gm

C
125 gm

D
135 gm
Question 8
4 / -1

At constant pressure, 0.5 m NaCl aqueous solution is diluted by adding water in it. Which of the following statement is correct in this reference ?

A
Van’t Hoff factor (i) and boiling point of the solution both decreases

B
Van’t Hoff factor (i) and boiling point of the solution both increases

C
Van’t Hoff factor (i) decreases while boiling point of the solution both increases

D
Van’t Hoff factor (i) increases while boiling point of the solution both decreases
Question 9
4 / -1

Boiling point of an aqueous solution of 0.5 m ionic solid substance is 100.5^oC; then state the value of i ? (Kb = 0.512^oC -kg – mole^-1)

A
1.95

B
1.85

C
1.25

D
0.85
Question 10
4 / -1

Aqueous solution of substance boils at 100.5^oC at 1 bar pressure; then at what temperature it freezes ? (K_b = 0.512^oC -k_g - mole^-1, K_f = 1.86^oC - k_g – mole^-1)

A
11.2^o C

B
29.84^o F

C
271.8^o K

D
-1.2^o C

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Re-Attempt Weekly Quiz Competition

Solutions Test - 47

Result

Solutions Test - 47

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SHARING IS CARING

Question 1

100.876oC

101.024oC

100.248oC

100.007oC

Solution

Question 2

0.22 RT

0.02 RT

0.4 RT

0.1 RT

Solution

Question 3

80.67%

60.5%

76.54%

84.75%

Question 4

Pox = 200 mm, Poy = 500 mm

Pox = 400 mm, Poy = 600 mm

Pox = 600 mm, Poy = 300 mm

Pox = 350 mm, Poy = 500 mm

Solution

Question 5

68 gm

60 gm

50 gm

75 gm

Question 6

300 ml, 700ml

250 ml, 750ml

400 ml, 600ml

280 ml, 720ml

Solution

Question 7

148.5 gm

14.85 gm

125 gm

135 gm

Question 8

Van’t Hoff factor (i) and boiling point of the solution both decreases

Van’t Hoff factor (i) and boiling point of the solution both increases

Van’t Hoff factor (i) decreases while boiling point of the solution both increases

Van’t Hoff factor (i) increases while boiling point of the solution both decreases

Question 9

1.95

1.85

1.25

0.85

Question 10

11.2o C

29.84o F

271.8o K

-1.2o C

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100.876^oC

101.024^oC

100.248^oC

100.007^oC

P^ox = 200 mm, Poy = 500 mm

P^ox = 400 mm, Poy = 600 mm

P^ox = 600 mm, Poy = 300 mm

P^ox = 350 mm, Poy = 500 mm

11.2^o C

29.84^o F

271.8^o K

-1.2^o C