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Free download in PDF Class 12 Chemistry Chapter 2 Solutions Multiple Choice Questions (MCQs) with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
To convert molality into which of the following unit of concentration require density of the solution ?
[A]
percentage weight by weight
[B]
percentage by volume
[C]
mole-fraction
[D]
given all
Answer: percentage by volume
(2)
Which of the following unit of concentration does not depend on temperature ?
[A]
formality
[B]
molarity
[C]
molality
[D]
normality
(3)
Which of the following unit of concentration depends on temperature ?
[A]
molality
[B]
normality
[C]
mole-fraction
[D]
given all
(4)
What would be the formality of solution prepared by dissolving 9.48 gm. Potash-alum dissolved in 5 litre water ?
[A]
0.04 F
[B]
0.02 F
[C]
0.002 F
[D]
0.004 F
(5)
What quantity of potash-alum is required to prepare 500ml solution having strength 1.5 F
[A]
711gm
[B]
355.5 gm
[C]
35.55 gm
[D]
71.1 gm
(6)
What would be the concentration in % w/v of aqueous solution in which 80 ml ethanol is dissolved in 4 lt. Solution ?
[A]
4% v/v
[B]
10% v/v
[C]
2% v/v
[D]
8% v/v
(7)
What would be the volume of acetone required to prepare 10% v/v acetone solution in 5 lt. Solution ?
[A]
50 ml
[B]
5 ml
[C]
100 ml
[D]
500 ml
(8)
15 % w/v solution of sugar is prepared by dissolving 1200 gm sugar in water, then, what would be the volume of the solution
[A]
8000 ml
[B]
4 lt
[C]
800 ml
[D]
5000 ml
(9)
0.004 gm O2 is dissolved in an aqueous solution of 50 litre, then, what would be the ppm of solution by weight-volume ?
[A]
0.04
[B]
0.008
[C]
0.004
[D]
0.08
(10)
The concentration of Ca2+ion in a sample of water is 0.0002 M then what would be the concentration of Ca2+ in ppm by weight-volume ? (Atomic wt. of ca = 40 gm/mole)
[A]
4
[B]
8
[C]
0.08
[D]
0.4
(11)
The concentration of F-ion in a sample of water is 10 ppm; then, concentration of F-ion in a solution in % w/v is
[A]
10-3
[B]
10-2
[C]
10
[D]
10-4
(12)
What would be the weight of O2 gas in gram dissolved in an aqueons solution of 500ml having strength 5 ppm ?
[A]
0.025
[B]
2.5 × 10-4
[C]
2.8 × 10-3
[D]
2.8 × 10-5
(13)
What would be the molarity of solution prepared by taking a mixture of 1400 ml 0.3 M, 700 ml 0.4 M and 500 ml 1.2 M aqueous solutions ?
[A]
0.5 M
[B]
0.8 M
[C]
0.6 M
[D]
0.7 M
(14)
What quantity of KOH is required to prepare 10 % w/w KOH solution having weight 1000 gm ?
[A]
50 gm
[B]
25 gm
[C]
100 gm
[D]
150 gm
(15)
What amount of water is added in an aqueous solution of 5000 ml having concentration 1.5 M to prepare 0.5 M solution ?
[A]
15 litre
[B]
5 litre
[C]
10 litre
[D]
20 litre
(16)
On Which factors, the solubility of gaseous solute in liquid depends ?
[A]
temperature
[B]
Pressure of the gas
[C]
Nature of gaseous solute and solvent
[D]
Given all
(17)
At 293 K temperature, if partial pressure of all given gases are same, then, which of the following gas possesses maximum solubility in water ?
[A]
He
[B]
N2
[C]
H2
[D]
O2
(18)
At 298 K temperature, if partial pressure of all given gases are same, then, which of the following gas possesses least solubility in water ?
[A]
carbon dioxide
[B]
formaldehyde
[C]
methane
[D]
vinyl chloride
(19)
At 293 K temperature, for solubility of all given gases, in water, which gas possesses lower value of KH ?
[A]
Carbon dioxide
[B]
formaldehyde
[C]
methane
[D]
vinyl chloride
(20)
In which of the following specific condition, CO2 gas is filled in cold drinks, and in soda water ?
[A]
at high temperature and high pressure
[B]
at low temperature and high pressure
[C]
at low temperature and low pressure
[D]
at high temperature and low pressure
Answer: at low temperature and low pressure
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