Questions
1
To convert molality into which of the following unit of concentration require density of the solution ?
Answer:percentage by volume
2
Which of the following unit of concentration does not depend on temperature ?
Answer:molality
3
Which of the following unit of concentration depends on temperature ?
Answer: normality
4
What would be the formality of solution prepared by dissolving 9.48 gm. Potash-alum dissolved in 5 litre water ?
Answer: 0.004 F
5
What quantity of potash-alum is required to prepare 500ml solution having strength 1.5 F
Answer: 355.5 gm
6
What would be the concentration in % w/v of aqueous solution in which 80 ml ethanol is dissolved in 4 lt. Solution ?
Answer:2% v/v
7
What would be the volume of acetone required to prepare 10% v/v acetone solution in 5 lt. Solution ?
Answer: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
Answer:8000 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 ?
Answer: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)
Answer:8
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
Answer:10-3
12
What would be the weight of O2 gas in gram dissolved in an aqueons solution of 500ml having strength 5 ppm ?
Answer: 2.8 × 10-3
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 ?
Answer: 0.5 M
14
What quantity of KOH is required to prepare 10 % w/w KOH solution having weight 1000 gm ?
Answer: 100 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 ?
Answer:10 litre
16
On Which factors, the solubility of gaseous solute in liquid depends ?
Answer: 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 ?
Answer: 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 ?
Answer:carbon dioxide
19
At 293 K temperature, for solubility of all given gases, in water, which gas possesses lower value of KH ?
Answer: formaldehyde
20
In which of the following specific condition, CO2 gas is filled in cold drinks, and in soda water ?
Answer: at low temperature and low pressure
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