Stoichiometry Questions and Answers - Set 14 - ObjectiveBooks
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# Practice Test: Question Set - 14

1. 40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
(A) 1/2
(B) 1/3
(C) 1/4
(D) 2/3

2. 1 gm mole of methane (CH4) contains
(A) 6.02 × 1023 atoms of hydrogen
(B) 4 gm atoms of hydrogen
(C) 3.01 × 1023 molecules of methane
(D) 3 gms of carbon

3. Pick out the wrong statement.
(A) 'Reduced temperature' of a substance is the ratio of its existing temperature to its critical temperature, both expressed on Celsius scale
(B) 'Reduced pressure' is the ratio of the existing pressure of a substance to its critical pressure
(C) 'Reduced volume' is the ratio of the existing molal volume of a substance to its critical molal volume
(D) None of these

4. Pick out the wrong statement.
(A) The evaporation of aqueous solution of glucose causes its molarity to increase
(B) Both the freezing point as well as boiling point of sea water is more than that of distilled water
(C) The solution containing equal masses of two liquids 'X' and 'Y' has the same mole fraction of' 'X' and 'Y'
(D) Both (b) and (c)

5. For estimation of heat capacity of a solid compound, one can use
(A) Clapeyron's equation
(B) Gibb's equation
(C) Kopp's rule
(D) Trouton's rule

6. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the
(A) Total pressure
(B) Absolute humidity at a given temperature
(C) Both (a) and (b)
(D) Neither (a) nor (b)

7. The hydroxyl ion (OH-) concentration in a solution having pH value 3 will be
(A) 10-11
(B) 10-10
(C) 10-3
(D) 10-4

8. The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
(A) Basic
(B) More acidic
(C) Neutral
(D) Of the same acidity

9. Pick out the wrong statement.
(A) Heat capacity of a diatomic gas is higher than that of a monatomic gas
(B) Equal volumes of Argon and Krypton contain equal number of atoms
(C) Total number of molecules contained in 22.4 liters of hydrogen at NTP is 6.023 × 1023
(D) The binary mixture of a particular composition in both vapor and liquid state is known as an Azeotropic mixture

10. According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.
(A) No component is concentrated at the surface of the solution
(B) The component molecules are non polar and are of almost equal size
(C) In the formation of solution, chemical combination/molecular association between unlike molecules takes place
(D) The attractive forces between like and unlike molecules are almost equal

11. 1 kg/cm2 is equal to
(A) 760 torr
(B) 1 KPa
(C) 10 meters of water column
(D) 1 meter of water column

12. Gases having same reduced temperatures and reduced pressures
(A) Deviate from ideal gas behavior to the same degree
(B) Have nearly the same compressibility factor
(C) Both (a) and (b)
(D) Neither (a) nor (b)

13. For a reaction, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
(A) 0
(B) 1
(C) 2
(D) 3

14. 'Giga' stands for
(A) 109
(B) 10-12
(C) 1012
(D) 1015

15. A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Naions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)
(A) 350
(B) 485
(C) 140
(D) 345

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