Free MCQs & Online Quiz Practice for Exams

Q: 10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a M HCl solution. The value of M HCl will be: (ETEA 2010)

A) 1.0

B) 0.75

C) 0.5

D) 0.25

Q: 2.3 g of ethanol (C₂H₅OH) is added to 500 g of water. Determine the molality of the resulting solution: (ETEA 2010)

A) 0.01 molal

B) 0.1 molal

C) 1.1 molal

D) 1.0 molal

Q: Water has a vapour pressure of 23.75 torr at 25°C. What is the vapour pressure of solution sucrose if its mole fraction is 0.25? (ETEA 2010)

A) 15.2 torr

B) 17.8 torr

C) 23.8 torr

D) 29.7 torr

Q: 0.1000 mole of NaCl was dissolved in 1.000 dm³ distilled water at 298 K. The concentration of resulting solution is: (ETEA 2011)

A) 5.85 m

B) 1.00 M

C) 0.1000 M

D) <0.1000 M

Q: The vapour pressure of pure acetone is 347 mmHg. A mixture of 58.0 g acetone and 2.0 g of water is made according to Raoult's law. What is the partial pressure of the acetone in this mixture? (ETEA 2011)

A) 382 mmHg

B) 298 mmHg

C) 242 mmHg

D) 312 mmHg

Q: Pure water freezes at 0°C and boils at 100°C at standard conditions. Calcium chloride was added to pure water. What do you expect about its freezing point and boiling point? (ETEA 2011)

A) No change in its freezing point and boiling point

B) Freezing point increases and boiling point decreases

C) Freezing point increases and boiling point increases

D) Freezing point decreases and boiling point increases

Q: The solubility of solute depends on: (ETEA 2011)

A) Temperature of solution

B) Quantity of solvent

C) Quantity of solute

D) All the three choices

Q: The solution formation of two miscible liquids perfectly obey Raoult's law if they satisfy the conditions: (ETEA 2012)

A) ΔH=1, ΔV=1

B) ΔH=1, ΔV=0

C) ΔH=0,ΔU=1

D) ΔH=0, ΔV=0

Q: If 20.0 cm³ of 0.5 m solution is diluted to 1.0 dm³. What will be its new concentration? (ETEA 2013)

A) 0.001 m

B) 0.01 m

C) 1.0 m

D) 10.0 m

Q: 18.0 g of glucose is dissolved in 100 g of solvent water. The molality of the resultant solution is: (ETEA 2015)

A) 0.01 m

B) 0.1 m

C) 1.0 m

D) 10.0 m

Q: A water sample contains 3.8×10² g of mercury per kilogram of the sample. What is the concentration of mercury in parts per million? (ETEA 2015)

A) 3.8 ppm

B) 38 ppm

C) 0.38 ppm

D) 380 ppm

Q: Nayab in laboratory dissolves 4 g of NaOH in 250 ml of water. The molality of this solution is: (ETEA 2015)

A) 0.4 m

B) 4 m

C) 0.2 m

D) 0.1 m

Q: Which of the following solutions will have high osmotic pressure? (ETEA 2016)

A) 1 molar solution of urea

B) 1 molar solution of glucose

C) 1 molar solution of sodium chloride

D) 1 molar solution of magnesium chloride

Q: The osmotic pressure of dilute solution is given below by relationship: (ETEA 2016)

A) π=MRT/C

B) π=RCT/M

C) π=MR/TC

D) π=RC/TM

Q: A solution contains 2 moles of sucrose in 6 moles of water. What is the mole fraction of sucrose? (ETEA 2016)

A) 0.25

B) 0.75

C) 0.5

D) 3.0

Q: A solution has three components A, B and C. The mole fraction of A and C are 0.15, 0.45 respectively. The mole fraction of component B is: (ETEA 2016)

A) 0.25

B) 0.05

C) 0.40

D) 0.60

Q: The stability of colloidal system depends on: (ETEA 2016)

A) Charge on the particle

B) Salvation

C) Brownian motion

D) All of the above

Q: Select an incorrect statement about colloids: (ETEA 2017)

A) Colloidal particles carry charges

B) Addition of electrolytes coagulates the solution

C) Every substance can be made to behave like lyophobic colloids

D) Every solid substance can be brought to colloidal state

Q: 10.0 dm³ gas cylinder containing mixture of various gases. 50 cm³ of nitrogen gas is in the mixture. What is the concentration of N₂ gas in part per billion [ppb]? (ETEA 2017)

A) 50/7000×10⁶

B) 50/×10⁹/7000

C) 50/700000×10

D) 50×10⁶

Q: Colloidal particles can be separated by using: (ETEA 2017)

A) Ordinary filter paper

B) Coarse filter paper

C) Fine filter paper

D) Extremely fine filter paper