Solutions Test

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Solutions Test - 46

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Weekly Quiz Competition

Question 1
4 / -1

What will be the molality of the solution prpared using 500 gm of 25 % w/w NaOH and 500 gm of 15 % w/w NaOH solution ? (Molecular weight of NaOH = 40 gm/mole)

A
12.74 m

B
6.25 m

C
9 m

D
5 m

Solution
Question 2
4 / -1

What wiil be the molality of solution prepared by taking 25 % w/w NaOH and 15 % w/w NaOH solution ? (Molecular weight of NaOH = 40 gm/mole)

A
12.74 m

B
5.5 m

C
9 m

D
4 m

Solution
Question 3
4 / -1

The density of 2.5 M NaOH solution is 1.15 gm/ml; then, which of the following alternative is correct for molarity and molality ?

A
M > m

B
M < m

C
M = m

D
can ’t b e predicted
Question 4
4 / -1

Which of the following is correct for an ideal solution ?

A
“H = 0, “V = 0, “S = 0

B
“H `” 0, “V = 0, “S = 0

C
“H = 0, “V = 0, “S `” 0

D
“H = 0, “V `” 0, “S = 0
Question 5
4 / -1

Boiling point of Aqueous solutions of 0.05 m ABC and 0.02 m X₂Y₃ are same at 1 bar pressure; then, what will be the values of Van’t Hoff factor (i) for solute in both the solutions ?

A
1.04, 5.1

B
1.9, 4.75

C
1.2, 3.4

D
1.5, 3.7
Question 6
4 / -1

Which of the following substances having concentration of aqueous solution 1% w/w, possesses higher boiling point ? (Molecular weight of Kcl, BaCl₂, glucose and Al₂(SO₄)₃ are 74.5, 208, 342 gm’mole respectively) (Assume that inonic solids dissociates completely in their aqueous solution)

A
KCl

B
BaCl₂

C
glucose

D
Al₂(SO₄)₃

Solution
Question 7
4 / -1

Molecular weight of biomolecules such as protein can be determined by ______ method.

A
osmotic pressure measurement

B
Depression in freezing point measurement

C
Elevation in boiling point measurement

D
Vapour pressure measurement
Question 8
4 / -1

In the references of the following graph, UR -Oy = __________.

A
(SU -VW)QU

B
VU(VW – QY)

C
(VW – QY)QU

D
VW(QV – VU)
Question 9
4 / -1

What will be the elevation in boiling point of an aqueous solution of 0.5 m NaCl ? ( i = 1.8)

A
2.04, 5.1

B
1.9, 4.57

C
1.2, 3.4

D
1.4, 3.7
Question 10
4 / -1

When 2 gm phenol id dissolve in 100gm benzene; then depression in freezing point is 0.69 K. If its association is dimeric, then calculate its degree of association (X). Molar depression constant for solvent is 5.12 K - kg - mole^-1.

A
0.0734

B
0.374

C
0.00734

D
0.734

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Re-Attempt Weekly Quiz Competition

Solutions Test - 46

Result

Solutions Test - 46

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SHARING IS CARING

Question 1

12.74 m

6.25 m

9 m

5 m

Solution

Question 2

12.74 m

5.5 m

9 m

4 m

Solution

Question 3

M > m

M < m

M = m

can ’t b e predicted

Question 4

“H = 0, “V = 0, “S = 0

“H `” 0, “V = 0, “S = 0

“H = 0, “V = 0, “S `” 0

“H = 0, “V `” 0, “S = 0

Question 5

1.04, 5.1

1.9, 4.75

1.2, 3.4

1.5, 3.7

Question 6

KCl

BaCl2

glucose

Al2(SO4)3

Solution

Question 7

osmotic pressure measurement

Depression in freezing point measurement

Elevation in boiling point measurement

Vapour pressure measurement

Question 8

(SU -VW)QU

VU(VW – QY)

(VW – QY)QU

VW(QV – VU)

Question 9

2.04, 5.1

1.9, 4.57

1.2, 3.4

1.4, 3.7

Question 10

0.0734

0.374

0.00734

0.734

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BaCl₂

Al₂(SO₄)₃