Solutions — DPP 3

20 NEET questions from Solutions, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Molality of 20 g NaOH in 100 g of water is;
  1. A 0.5 m
  2. B 5 m
  3. C 0.1 m
  4. D 1 m
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Correct answer: B

2
Which one O₂ of the following gases has the lowest value of Henry's law constant at 293 K ?
  1. A N₂
  2. B He
  3. C CO₂
  4. D O₂
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Correct answer: C

3
Henry's Law does not apply to which gas?
  1. A Ar
  2. B CH₄
  3. C NH₃
  4. D He
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Correct answer: C

4
The density of 2 M solution of acetic acid (Molar Mass = $60 \mathrm {~g} \mathrm {~mol} ^ { - 1 }$) is $1.02 \mathrm {~g} \mathrm {~mL} ^ { - 1 }$. The molality of the solution ' X ' is:
  1. A 1.0 m
  2. B 2.0 m
  3. C 2.22 m
  4. D 2.25 m
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Correct answer: C

5
What is the molarity of 3.6 g glucose present in 1 L of solution?
  1. A 0.1 M
  2. B 0.01 M
  3. C 0.5 M
  4. D 0.02 M
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Correct answer: D

6
If 0.01 mol of solute is present in 500 mL of solution, its molarity is;
  1. A 0.01 M
  2. B 0.005 M
  3. C 0.02 M
  4. D 0.1 M
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Correct answer: C

7
Henry's law constant for $\mathrm { CO } _ { 2 }$ in water is $1.67 \times 10 ^ { 8 } \mathrm {~Pa}$ at 298 K . The quantity of $\mathrm { CO } _ { 2 }$ in 500 mL of soda water when packed under $2.5 \mathrm {~atm} \mathrm {~CO } _ { 2 }$ pressure at 298 K is;
  1. A 0.0084 g
  2. B 0.00084 g
  3. C 1.848 g
  4. D 8.4 g
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Correct answer: C

8
Four gases like $\mathrm { H } _ { 2 } , \mathrm { He } , \mathrm { CH } _ { 4 }$ and $\mathrm { CO } _ { 2 }$ have Henry's constant values $\left( \mathrm { K } _ { \mathrm { H } } \right)$ as $69.16,144.97,0.413$ and 1.67 . The gas which is more soluble in liquid is;
  1. A He
  2. B $\mathrm { CH } _ { 4 }$
  3. C $\mathrm { H } _ { 2 }$
  4. D $\mathrm { CO } _ { 2 }$
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Correct answer: B

9
Normality of $0.1 \mathrm {~M } \mathrm {~H } _ { 3 } \mathrm { PO } _ { 3 }$ is:
  1. A 0.2 N
  2. B 0.3 N
  3. C 0.033 N
  4. D 0.05 N
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Correct answer: A

10
What is the mole fraction of glucose in 10% w/w glucose solution?
  1. A 0.01
  2. B 0.02
  3. C 0.03
  4. D 0.04
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Correct answer: A

11
Van't Hoff factor ( $i$ ) is given by the expression:
  1. A $i=\frac{\text { normal molar mass }}{\text { abnormal molar mass }}$
  2. B $i=\frac{\text { abnormal molar mass }}{\text { normal molar mass }}$
  3. C $i=\frac{\text { observed colligative property }}{\text { calculated colligative property }}$
  4. D $i=\frac{\text { calculated colligative property }}{\text { observed colligative property }}$
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Correct answer: C

12
Match the column and choose correct option.
Solutions – NEET-8671
  1. A A-(S); B-(R); C-(P); D-(Q)
  2. B A-(R); B-(S); C-(Q); D-(P)
  3. C A-(S); B-(P); C-(R); D-(Q)
  4. D A-(S); B-(R); C-(Q); D-(P)
Show answer

Correct answer: D

13
The volume of water that must be added to a mixture of 250 mL of 6 M HCl and 650 ml of 3 M HCl to obtain 3 M solution is;
  1. A 75 mL
  2. B 150 mL
  3. C 300 mL
  4. D 250 mL
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Correct answer: D

14
Molarity of $\mathrm { H } _ { 2 } \mathrm { SO } _ { 4 }$ solution is 18 M . If density of solution is $1.8 \mathrm {~g} / \mathrm { cm } ^ { 3 }$. Calculate molality of solution.
  1. A 500 m
  2. B 360 m
  3. C 180 m
  4. D 1000 m
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Correct answer: A

15
Which of these curves represents Henry's Law? (m = solubility and p = pressure of gas)
  1. A
  2. B
  3. C
  4. D
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Correct answer: D

16
If 36.0 g of glucose is present in 400 mL of solution, molarity of the solution is;
  1. A 0.05 M
  2. B 11.0 M
  3. C 0.5 M
  4. D 2.0 M
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Correct answer: C

17
A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 27°C. If mole fraction of ethyl alcohol is 0.65, then calculate the vapour pressure of pure ethyl alcohol and vapour pressure of pure propyl alcohol is 210 mm.
  1. A 333.1 mm
  2. B 133.1 mm
  3. C 373.2 mm
  4. D 433.1 mm
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Correct answer: A

18
3.42 g of a substance of molar mass $342 \mathrm {~g} \mathrm {~mol} ^ { - 1 }$ is present in 250 g of water. Molality of this solution is;
  1. A 0.4 m
  2. B 0.04 m
  3. C 0.8 m
  4. D 4 m
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Correct answer: B

19
How many grams of $\mathrm { CO } _ { 2 }$ gas is dissolved in a 1 L bottle of carbonated water if the manufacturer uses a pressure of 2.4 atmosphere in the bottling process at $25 ^ { \circ } \mathrm { C }$ ? Given: $\mathrm { K } _ { \mathrm { H } }$ of $\mathrm { CO } _ { 2 }$ in water $= 29.76 \mathrm {~atm} ( \mathrm {~mol} / \mathrm { L } ) ^ { - 1 }$ at $25 ^ { \circ } \mathrm { C }$.
  1. A 3.52
  2. B 4.2
  3. C 3.1
  4. D 2.5
Show answer

Correct answer: A

20
What volume of 0.8 M solution contains 0.1 mol of the solute?
  1. A 100 mL
  2. B 125 mL
  3. C 500 mL
  4. D 62.5 mL
Show answer

Correct answer: B

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