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Free download in PDF Class 11 Chemistry Chapter 5 States of Matter Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER and other competitive exams. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. The States of Matter is one of the fundamental concepts of Chemistry. These short solved questions or quizzes are provided by Gkseries./p>
(1)
If the temperature is doubled, the average velocity of a gaseous molecule increases by
[A]
4
[B]
1.4
[C]
2
[D]
2.8
(2)
What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
[A]
low temperature and low pressure
[B]
low temperature and high pressure
[C]
high temperature and low pressure
[D]
high temperature and high pressure
Answer: high temperature and low pressure
(3)
A container with a pin-hole contains equal moles of H2(g) and O2(g). Find the fraction of oxygen gas escaped at the same time when one-fourth of hydrogen gas escapes
[A]
1/16
[B]
1/4
[C]
1/2
[D]
1/8
(4)
__________ can be readily liquefied when ‘a’ for NH3 is 4.17, SO2 is 6.71, CO2 is 3.59 and Cl2 is 6.49.
[A]
CO2
[B]
NH3
[C]
Cl2
[D]
SO2
(5)
Which of these will have the highest rate of diffusion, if they are in the same container and at the same temperature?
[A]
56g N2
[B]
4g H2
[C]
22g CO2
[D]
32g O2
(6)
_________ is the % of gas which remains in an open container when it is heated from 300 K to 400 K.
[A]
100%
[B]
75%
[C]
50%
[D]
25%
(7)
Which of these is Vander Waals’ equation for a real gas?
[A]
(P +a/V2) (V-b) = RT
[B]
P=nRT/ V – nB – an2/ V2
[C]
(P=n2a/V2) (V-nb) = nRt
[D]
All of these
(8)
________ is the numerical value of Cp - Cv.
[A]
R
[B]
M/R
[C]
R/M
[D]
None of these
(9)
When 600 cc of gas is compressed to 500 cc at a pressure of 750 mm. Given the temperature is kept constant, the pressure would increase by:
[A]
350 mm.
[B]
250 mm.
[C]
450 mm.
[D]
150 mm.
(10)
‘Air at sea level is dense.’ – It is a practical application of _________.
[A]
Charles’ Law.
[B]
Dalton’s Law.
[C]
Boyle’s Law.
[D]
Avogadro’s Law.
(11)
Which of these is the partial pressure of dry gas?
[A]
Equivalent to the partial pressure of the wet gas.
[B]
Lesser than the wet gas.
[C]
Greater than the wet gas.
[D]
None of these.
Answer: Lesser than the wet gas.
(12)
When ____ is passed through diluted blood, it imparts a cherry-red colour to it.
[A]
CO
[B]
NH3
[C]
CO2
[D]
COCl2
(13)
What happens to the mean free path with an increase in pressure?
[A]
Increases
[B]
Decreases
[C]
Remains the same.
[D]
Becomes zero.
(14)
The Vander Waals’ force in hydrogen and helium are ________.
[A]
Very strong.
[B]
Strong.
[C]
Weak.
[D]
None of these.
(15)
All gases except He and H2 exhibit __________ at a lower temperature.
[A]
Positive deviation
[B]
Positive deviation and negative deviation
[C]
Negative deviation
[D]
None of these
Answer: Negative deviation
(16)
_________________ makes carbon dioxide obey the ideal gas laws.
[A]
High temperature and low pressure
[B]
Low temperature and a high pressure
[C]
High temperature and a high pressure
[D]
Low temperature and low pressure
Answer: High temperature and low pressure
(17)
Which of these is the reason why an ideal gas does not liquefy?
[A]
Its molecules are smaller in size.
[B]
There is a negligible force between its molecules.
[C]
It solidifies.
[D]
Its temperature is above 0°.
Answer: There is a negligible force between its molecules.
(18)
Beans cook faster in a pressure cooker because:
[A]
The extra pressure softens the beans.
[B]
When pressure increases, the boiling point also increases.
[C]
When pressure increases boiling point decreases.
[D]
Internal energy does not get lost while cooking.
Answer: When pressure increases, the boiling point also increases.
(19)
Which of these is the unit of constant ‘b’ in Vander Waals’ equation?
[A]
cm3 mol-1
[B]
m3 mol-1
[C]
litre mol-1
[D]
all of these
(20)
Which of these is the unit of constant ‘a’ in Vander Waals’ equation?
[A]
dyne cm4 mol-2
[B]
Newton m4 mol-2
[C]
atm litre2 mol-2
[D]
All of these
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