Stoichiometry MCQs

Question 1

The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.

Accepted Answer

Less than

Answer

More than

Answer

Equal to

Answer

Either more or less; depends on the solvent

Question 2

Pick out the wrong unit conversion of thermal conductivity.

Accepted Answer

1 BTU/ft 2 .hr.°F/inch = 1.488 kcal/m 2 .hr.°C/m

Answer

1 BTU/ft 2 .hr.°F/ft = 1.488 kcal/m 2 .hr.°C/m

Answer

1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m.°K

Answer

1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F

Question 3

In the reaction, Ca + 2H 2 O = Ca(OH) 2 + H 2 ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)

Accepted Answer

4480

Answer

2240

Answer

1120

Answer

0.4

Question 4

Pick out the wrong conversion formula for the conversion of weight units :

Accepted Answer

None of these

Answer

1 tonne = 1000 kg = 22.046 lbs

Answer

1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton

Answer

1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons

Question 5

The temperature at which real gases obey the ideal gas law over a wide range of pressure is called the __________ temperature.

Accepted Answer

Inversion

Answer

Reduced

Answer

Boyle

Answer

Critical

Question 6

1 torr is equivalent to

Accepted Answer

1 mm Hg

Answer

1 Pascal

Answer

1 ata

Answer

1 mm wc

Question 7

Kinematic viscosity of 1 m 2 /second is equivalent to __________ stokes.

Accepted Answer

10 4

Answer

10

Answer

10 2

Answer

10 3

Question 8

Isotonic solutions must have the same

Accepted Answer

Molar concentration

Answer

Viscosity

Answer

Normality

Answer

Critical temperature

Question 9

Which of the following is not a unit of pressure?

Accepted Answer

Parsec

Answer

Torr

Answer

Newton/m 2

Answer

Ata, bar or pascal