Gaseous state – Online MCQ test

Online MCQ test on gaseous state

– In this topic we offer you, online MCQ test in the fundmental of gaseous state .

– It is a simple test to measure the strength of your knowledge in the basics of understanding the topics of gaseous state.

– The test consists of only (20) questions (multiple choice) you must answer all of them so that your final score appears automatically at the top of the topic.

– you will pass the Exam If get 70% or more.

– If you fail the test, you can retake the test again by reloading the page

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#1. Which of the following is the correct mathematical relation for Charle’s law at constant pressure?

V ∝ T

V ∝ t

V = kt

none of these

#2. The average velocity of a gas is given by _____

(a)

(b)

(c)

(d)

#3. The real gases show nearly ideal behaviour at _____

low pressures and low temperatures

high pressures and low temperatures

high pressures and high temperatures

low pressures and high temperatures

#4. Gas A diffuses twice as fast as another gas B. If the vapour density of the gas A is 2, the molecular mass of gas B is __

2

4

8

16

#5. Equal volume of all gases at the same temperature and pressure contain equal number of molecules” is the statement of _____

combined gas law

Charle’s law

Avogadro’s law

Boyle’s law

#6. A gas is heated at constant temperature. Then ____

the no. of molecules of the gas increases

the kinetic energy of the gas molecules decreases

the kinetic energy of the gas molecules remains unaltered

the kinetic energy of the gas molecules increases

#7. Which of the following gases will have the lowest rate of diffusion?

H2

N2

F2

O2

#8. 290 ml of a gas at 17°C is cooled to –13°C at constant pressure. The new volume of the gas will be

260 ml

270 ml

280 ml

290 ml

#9. The free path is the distance travelled by the molecule ____

after collision

before collision

in one second

in one minute

#10. The mass of 2240 ml of CO2 at NTP will be _____

4.0 g

4.4 g

8.8 g

8.0 g

#11. According to Gay Lussac’s law for a fixed volume of a given gas?

P/T = a constant

P ∝ 1/T

P = k/T

PT = k

#12. The value of γ , the specific heat ratio, for a monoatomic gas is _____

1.40

1.667

1.33

0

#13. For one mole of a gas the kinetic energy is given by ___

E = 1/2 RT

E = 3/2 RT

E = 5/2 RT

E = 7/2 RT

#14. The total pressure of a mixture of gases (non–reacting) is equal to the sum of the partial pressures of all the gases present” is the statement of ____

Graham’s law of diffusion

Dalton’s law of partial pressures

Avogadro’s law of partial pressures

none of these

#15. In van der Waal’s equation of state for a non-ideal gas the net force of attraction among the molecules is given by ____

(a)

(b)

(c)

(d)

#16. For one mole of a gas, the ideal gas equation is ____

PV = RT

PV = 1/2 RT

PV = 3/2 RT

PV = 5/2 RT

#17. Which of the following gases will have the highest rate of diffusion?

NH3

CH4

N2

CO2

#18. If the pressure and absolute temperature of 3 litres of a gas are doubled, its volume would be ___

2 litres

3 litres

6 litres

12 litres

#19. According to Boyle’s law the volume of a fixed mass of a gas, at constant temperature, is

directly proportional to its pressure

inversely proportional to its pressure

the square root of its pressure

none of these

#20. The compressibility factor, z, for an ideal gas is ____

zero

less than one

greater than one

equal to one

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