Stoichiometry Mcqs for Chemical - Set 7

1)   The unit of dynamic viscosity is_________________?

a. Stoke
b. Poise
c. gm/cm sec
d. Both B. & C.
Answer  Explanation 

ANSWER: Both B. & C.

Explanation:
No explanation is available for this question!


2)   Unit of power is____________________?

a. Joule
b. Watt
c. Joule/Second
d. Both B. & C.
Answer  Explanation 

ANSWER: Both B. & C.

Explanation:
No explanation is available for this question!


3)   1 kg/m2 is equal to ______________ mm water column?

a. 1
b. 10
c. 100
d. 1000
Answer  Explanation 

ANSWER: 1

Explanation:
No explanation is available for this question!


4)   Except for monatomic gases, the molal heat capacity at constant volume for all gases is _____________ Kcal/Kg mole.° K?

a. 3
b. > 3
c. < 3
d. < 1
Answer  Explanation 

ANSWER: > 3

Explanation:
No explanation is available for this question!


5)   The crystallisation of a solute from a solution may be done by________________?

a. Removal of pure solvent by evaporation
b. Change of temperature thereby causing super-saturation
c. Changing the nature of the system by the addition of a more soluble material
d. All A., B. & C.
Answer  Explanation 

ANSWER: All A., B. & C.

Explanation:
No explanation is available for this question!


6)   Boiling point of a non-homogeneous mixture of immiscible liquids is _____________ that of any one of its separate components?

a. Lower than
b. Higher than
c. Equal to
d. Either A. or B.; depends on the liquids
Answer  Explanation 

ANSWER: Lower than

Explanation:
No explanation is available for this question!


7)   The vapour pressure of a solution (made by dissolving a solute in a solvent) is ____________ that of the pure solvent?

a. Less than
b. More than
c. Equal to
d. Either more or less; depends on the solvent
Answer  Explanation 

ANSWER: Less than

Explanation:
No explanation is available for this question!


8)   At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?

a. 273°C
b. 273°K
c. 100°C
d. 200°C
Answer  Explanation 

ANSWER: 273°C

Explanation:
No explanation is available for this question!


9)   2 litres of nitrogen at N.T.P. weighs ______________ gms ?

a. 14
b. 2.5
c. 28
d. 1.25
Answer  Explanation 

ANSWER: 2.5

Explanation:
No explanation is available for this question!


10)   Heat of reaction is a function of the___________________?

a. Pressure
b. Temperature
c. Both A. & B.
d. Neither A. nor B.
Answer  Explanation 

ANSWER: Both A. & B.

Explanation:
No explanation is available for this question!


11)   The average translational kinetic energy with which a gas molecule is endowed is dependent on its__________________?

a. Nature
b. Size
c. Absolute temperature
d. All A., B. & C.
Answer  Explanation 

ANSWER: Absolute temperature

Explanation:
No explanation is available for this question!


12)   Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the_________________?

a. Recycling
b. Purging
c. Bypassing
d. Recirculation
Answer  Explanation 

ANSWER: Purging

Explanation:
No explanation is available for this question!


13)   The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?

a. Increases
b. Decreases
c. Remains unchanged
d. Increases linearly
Answer  Explanation 

ANSWER: Decreases

Explanation:
No explanation is available for this question!


14)   Enthalpy of a vapor gas mixture may be increased by increasing the________________?

a. Temperature at constant humidity
b. Humidity at constant temperature
c. Temperature and the humidity
d. All A., B. & C.
Answer  Explanation 

ANSWER: All A., B. & C.

Explanation:
No explanation is available for this question!


15)   During a phase change process like sublimation, vaporisation, melting etc., the specific ____________ does not change?

a. Enthalpy
b. Gibbs free energy
c. Internal energy
d. Entropy
Answer  Explanation 

ANSWER: Gibbs free energy

Explanation:
No explanation is available for this question!


16)   The maximum adiabatic flame temperature of fuels in air is ____________ the maximum flame temperature in pure oxygen?

a. Lower than
b. Higher than
c. Same as
d. Not related to
Answer  Explanation 

ANSWER: Lower than

Explanation:
No explanation is available for this question!


17)   A vessel of volume 1000 m3 contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately ?

a. 17
b. 20
c. 25
d. 34
Answer  Explanation 

ANSWER: 17

Explanation:
No explanation is available for this question!


18)   Kinematic viscosity of 1 m2 /second is equivalent to _____________ stokes?

a. 10
b. 102
c. 103
d. 104
Answer  Explanation 

ANSWER: 104

Explanation:
No explanation is available for this question!


19)   For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ?

a. Dry bulb temperature
b. Wet bulb temperature
c. Humidity
d. Relative saturation
Answer  Explanation 

ANSWER: Wet bulb temperature

Explanation:
No explanation is available for this question!


20)   At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?

a. Increases
b. Decreases
c. Remains unchanged
d. Increases linearly
Answer  Explanation 

ANSWER: Increases

Explanation:
No explanation is available for this question!