Solution Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Which is correct about Henry's law

Answers Choices:

The gas in contact with the liquid should behave as an ideal gas

There should not be any chemical interaction between the gas and liquid

The pressure applied should be high

All of these

Questions 2 of 50

Question:The statement : If 0.003 moles of a gas are dissolved in 900 g of water under a pressure of 1 atmosphere, 0.006 moles will be dissolved under a pressure of 2 atmospheres", illustrates

Answers Choices:

Dalton's law of partial pressure

Graham's law

Raoult's law

Henry's law

Questions 3 of 50

Question:A mixture has 18g water and 414g ethanol. The mole fraction of water in mixture is (assume ideal behaviour of the mixture)

Answers Choices:

0.1

0.4

0.7

0.9

Questions 4 of 50

Question:The number of molecules in 4.25 g of ammonia is approximately

Answers Choices:

\(0.5 \times {10^{23}}\)

\(1.5 \times {10^{23}}\)

\(3.5 \times {10^{23}}\)

\(2.5 \times {10^{23}}\)

Questions 5 of 50

Question:2.0 molar solution is obtained , when 0.5 mole solute is dissolved in

Answers Choices:

250 ml solvent

250 g solvent

250 ml solution

1000 ml solvent

Questions 6 of 50

Question:How many gram of HCl will be present in \(150\,ml\) of its 0.52 M solution

Answers Choices:

2.84 gm

5.70 gm

8.50 gm

3.65 gm

Questions 7 of 50

Question:Which of the following should be done in order to prepare \(0.40M\,NaCl\) starting with \(100\,ml\) of \(0.30M\,NaCl\) (mol.wt. of \(NaCl = 58.5\))

Answers Choices:

Add \(0.585\,g\,NaCl\)

Add \(20\,ml\) water

Add \(0.010ml\,NaCl\)

Evaporate \(10ml\) water

1 and 3 are correct

Questions 8 of 50

Question:Which of the following solutions has the highest normality

Answers Choices:

8 gm of \(KOH\)/ litre

\(N\) phosphoric acid

6 gm of \(NaOH\)/ 100 m

l\(0.5M\,{H_2}S{O_4}\)

Questions 9 of 50

Question:To prepare a solution of concentration of 0.03 g/ml of \(AgN{O_3}\), what amount of \(AgN{O_3}\) should be added in 60 ml of solution

Answers Choices:

1.8

0.8

0.18

None of these

Questions 10 of 50

Question:How many grams of dibasic acid (mol. wt. 200) should be present in \(100ml\) of its aqueous solution to give decinormal strength

Answers Choices:

\(1g\)

\(2g\)

\(10g\)

\(20g\)

Questions 11 of 50

Question:If 25 ml of 0.25 M NaCl solution is diluted with water to a volume of 500ml the new concentration of the solution is

Answers Choices:

0.167 M

0.0125 M

0.833 M

0.0167 M

Questions 12 of 50

Question:10 grams of a solute is dissolved in 90 grams of a solvent. Its mass percent in solution is

Answers Choices:

0.01

11.1

10

9

Questions 13 of 50

Question:A solution contains \(25\% {H_2}O\) ,\(25\% {C_2}{H_5}OH\) and \(50\% \,C{H_3}\,COOH\) by mass. The mole fraction of \({H_2}O\) would be

Answers Choices:

0.25

2.5

0.503

5.03

Questions 14 of 50

Question:A 5 molar solution of \({H_2}S{O_4}\) is diluted from 1 litre to 10 litres. What is the normality of the solution

Answers Choices:

0.25 N

1 N

2 N

7 N

Questions 15 of 50

Question:To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid \(({H_3}P{O_3}),\) the volume of 0.1 M aqueous KOH solution required is

Answers Choices:

40 mL

20 mL

10 mL

60 mL

Questions 16 of 50

Question:On dissolving 1 mole of each of the following acids in 1 litre water, the acid which does not give a solution of strength \(1N\) is

Answers Choices:

\(HCl\)

Perchloric acid

\(HN{O_3}\)

Phosphoric acid

Questions 17 of 50

Question:Molarity of a solution prepared by dissolving 75.5 g of pure KOH in 540 ml solution is

Answers Choices:

3.05 M

1.35 M

2.50 M

4.50 M

Questions 18 of 50

Question:Which one of the following is an extensive property

Answers Choices:

Molar volume

Molarity

Number of moles

Mole fraction

Questions 19 of 50

Question:The number of moles of \(KCl\) in \(1000\,ml\) of 3 molar solution is

Answers Choices:

1

2

3

1.5

Questions 20 of 50

Question:The unit of molality is

Answers Choices:

Mole per litre

Mole per kilogram

Per mole per litre

Mole litre

Questions 21 of 50

Question:The relative lowering of the vapour pressure is equal to the mole fraction of the solute." This law is called

Answers Choices:

Henry's law

Raoult's law

Ostwald's law

Arrhenius's law

Questions 22 of 50

Question:The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be

Answers Choices:

18

342

60

180

Questions 23 of 50

Question:Among the following substances the lowest vapour pressure is exerted by

Answers Choices:

Water

Mercury

Kerosene

Rectified spirit

Questions 24 of 50

Question:According to Raoult's law the relative lowering of vapour pressure of a solution of volatile substance is equal to

Answers Choices:

Mole fraction of the solvent

Mole fraction of the solute

Weight percentage of a solute

Weight percentage of a solvent

Questions 25 of 50

Question:60 gm of Urea (Mol. wt 60) was dissolved in 9.9 moles, of water. If the vapour pressure of pure water is \({P_o}\), the vapour pressure of solution is

Answers Choices:

0.10 \({P_o}\)

1.10 \({P_o}\)

0.90 \({P_o}\)

0.99 \({P_o}\)

Questions 26 of 50

Question:The vapour pressure of water at \({20^o}C\) is 17.54 mm. When 20g of a non-ionic, substance is dissolved in 100g of water, the vapour pressure is lowered by 0.30 mm. What is the molecular weight of the substances

Answers Choices:

210.2

206.88

215.2

200.8

Questions 27 of 50

Question:All form ideal solutions except

Answers Choices:

\({C_2}{H_5}Br\) and \({C_2}{H_5}I\)

\({C_6}{H_5}Cl\) and \({C_6}{H_5}Br\)

\({C_6}{H_6}\) and \({C_6}{H_5}C{H_3}\)

\({C_2}{H_5}I\) and \({C_2}{H_5}OH\)

Questions 28 of 50

Question:Which property is shown by an ideal solution

Answers Choices:

It follows Raoult's law

\(\Delta {H_{mix}} = 0\)

\(\Delta {V_{mix}} = 0\)

All of these

Questions 29 of 50

Question:Which of the following mixture shows positive deviation by ideal behavior

Answers Choices:

\(CHC{l_3} + {(C{H_3})_2}CO\)

\({C_6}{H_6} + {C_6}{H_5}C{H_3}\)

\({H_2}O + HCl\)

\(CC{l_4} + CHC{l_3}\)

Questions 30 of 50

Question:Which property is not found in ideal solution

Answers Choices:

\({P_A} \ne P_A^o \times {X_A}\)

\(\Delta {H_{mix}} \ne 0\)

\(\Delta {V_{mix}} \ne 0\)

All of these

Questions 31 of 50

Question:Osmotic pressure of a solution containing 0.1 mole of solute per litre at \(273K\) is (in atm)

Answers Choices:

\(\frac{{0.1}}{1} \times 0.08205 \times 273\)

\(0.1 \times 1 \times 0.08205 \times 273\)

\(\frac{1}{{0.1}} \times 0.08205 \times 273\)

\(\frac{{0.1}}{1} \times \frac{{273}}{{0.08205}}\)

Questions 32 of 50

Question:A solution contains non-volatile solute of molecular mass \({M_p}\). Which of the following can be used to calculate molecular mass of the solute in terms of osmotic pressure (m = Mass of solute, V = Volume of solution and p = Osmotic pressure)

Answers Choices:

\(Mp = \left( {\frac{m}{\pi }}

\right)\,VRT\)\(\)

\(Mp = \left( {\frac{m}{V}} \right)\frac{{RT}}{\pi }\)

\(Mp = \left( {\frac{m}{V}} \right)\frac{\pi }{{RT}}\)

\(Mp = \left( {\frac{m}{V}} \right)\,\pi RT\)

Questions 33 of 50

Question:The osmotic pressure of \(1\,m\) solution at \({27^o}C\) is

Answers Choices:

2.46 atm

24.6 atm

1.21 atm

12.1 atm

Questions 34 of 50

Question:Osmotic pressure of a solution can be measured quickly and accurately by

Answers Choices:

Berkeley and Hartley's method

Morse's method

Pfeffer's method

De Vries method

Questions 35 of 50

Question:Which one of the following would lose weight on exposure to atmosphere

Answers Choices:

Concentrated \({H_2}S{O_4}\)

Solid \(NaOH\)

A saturated solution of \(C{O_2}\)

Anhydrous sodium carbonate

Questions 36 of 50

Question:The molecular weight of \(NaCl\) determined by osmotic pressure method will be

Answers Choices:

Same as theoritical value

Higher than theoritical value

Lower than theoritical value

None of these

Questions 37 of 50

Question:If molecular weight of compound is increased then sensitivity is decreased in which of the following methods

Answers Choices:

Elevation in boiling point

Viscosity

Osmosis

Dialysis

Questions 38 of 50

Question:If solubility of \(NaCl\) at \({20^o}C\) is 35 \(gm\) per 100 gm of water. Then on adding 50 gm of \(NaCl\) to the same volume at same temperature the salt remains undissolved is

Answers Choices:

15 gm

20 gm

50 gm

35 gm

Questions 39 of 50

Question:When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings

Answers Choices:

A decrease in boiling point of solution

An increase in boiling point of the solution

A decrease in freezing point of the solution

An increase in freezing point of the solution

Questions 40 of 50

Question:Elevation in boiling point was \({0.52^o}C\) when \(6\,gm\) of a compound \(X\) was dissolved in \(100\,gm\) of water. Molecular weight of \(X\) is \(({K_b}\) for water is 0.52 per 1000 gm of water)

Answers Choices:

120

60

180

600

Questions 41 of 50

Question:Mark the correct relationship between the boiling points of very dilute solutions of \(BaC{l_2}\,({t_1})\) and \(KCl\,({t_2})\), having the same molarity

Answers Choices:

\({t_1} = {t_2}\)

\({t_1} > {t_2}\)

\({t_2} > {t_1}\)

\({t_2}\) is approximately equal to \({t_1}\)

Questions 42 of 50

Question:Molal depression constant for water is \({1.86^o}C\). The freezing point of a 0.05 molal solution of a non-electrolyte in water is

Answers Choices:

\( - {1.86^o}C\)

\( - {0.93^o}C\)

\( - {0.093^o}C\)

\({0.93^o}C\)

Questions 43 of 50

Question:Given that \(\Delta {T_f}\) is the depression in freezing point of the solvent in a solution of a non-volatile solute of molality \(m\), the quantity \(\mathop {\lim }\limits_{m \to 0} \left( {\frac{{\Delta {T_f}}}{m}} \right)\) is equal to

Answers Choices:

Zero

One

Three

None of the above

Questions 44 of 50

Question:The freezing point of 1 percent solution of lead nitrate in water will be

Answers Choices:

Below \({0^o}C\)

\({0^o}C\)

\({1^o}C\)

\({2^o}C\)

Questions 45 of 50

Question:Osmotic pressure of 0.1 M solution of \(NaCl\) and \(N{a_2}S{O_4}\) will be

Answers Choices:

Same

Osmotic pressure of \(NaCl\) solution will be more than \(N{a_2}S{O_4}\) solution

Osmotic pressure of \(N{a_2}S{O_4}\) solution will be more than \(NaCl\)

Osmotic pressure of \(NaS{O_4}\) will be less than that of \(NaCl\) solution

Questions 46 of 50

Question:Which of the following solutions has highest osmotic pressure

Answers Choices:

\(1\,M\,NaCl\)

1 M urea

1 M sucrose

1 M glucose

Questions 47 of 50

Question:Which of the following has lowest freezing point

Answers Choices:

\(0.1\,M\) aqueous solution of glucose

\(0.1\,M\) aqueous solution of \(NaCl\)

\(0.1M\) aqueous solution of \(ZnS{O_4}\)

\(0.1\,M\) aqueous solution of urea

Questions 48 of 50

Question:The freezing points of equimolar solutions of glucose, \(KN{O_3}\) and \(AlC{l_3}\) are in the order of

Answers Choices:

\(AlC{l_3} < KN{O_3} < {\rm{Glucose}}\)

\({\rm{Glucose}} < KN{O_3} < AlC{l_3}\)

\({\rm{Glucose}} < AlC{l_3} < KN{O_3}\)

\(AlC{l_3} < {\rm{Glucose}} < KN{O_3}\)

Questions 49 of 50

Question:If \(\alpha \) is the degree of dissociation of \(N{a_2}S{O_4}\), the Vant Hoff's factor (i) used for calculating the molecular mass is

Answers Choices:

\(1 + \alpha \)

\(1 + 2\alpha \)

\(1 - 2\alpha \)

None of these

Questions 50 of 50

Question:Van't Hoff factor \(i\)

Answers Choices:

\( = \frac{{{\rm{Normal molecular mass}}}}{{{\rm{Observed molecular mass}}}}\)

\( = \frac{{{\rm{Observed molecular mass}}}}{{{\rm{Normal molecular mass}}}}\)

Less than one in case of dissociation

More than one in case of association