States of Matter Practice Questions
Class 11 · Chemistry · 1897 free MCQs with instant results and detailed explanations.
1897
Total
637
Easy
946
Medium
314
Hard
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Topics in States of Matter
Ideal Gas Equation
451
Kinetic Molecular Theory
525
Gas Laws
441
Liquefaction of Gases
480
Sample Questions from States of Matter
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the relationship between pressure and volume in Boyle's Law?
A.
Pressure is directly proportional to volume.
B.
Pressure is inversely proportional to volume.
C.
Pressure and volume are unrelated.
D.
Pressure is proportional to the square of volume.
Show Answer & Explanation
Correct Answer: B
Boyle's Law states that pressure is inversely proportional to volume at constant temperature.
Q2
Easy
If the temperature of a gas is doubled at constant volume, what happens to its pressure?
A.
Pressure remains the same.
B.
Pressure is halved.
C.
Pressure is doubled.
D.
Pressure is tripled.
Show Answer & Explanation
Correct Answer: C
According to Gay-Lussac's Law, pressure is directly proportional to temperature at constant volume.
Q3
Easy
What happens to the volume of a gas when it is compressed at constant temperature?
A.
Volume increases.
B.
Volume decreases.
C.
Volume remains unchanged.
D.
Volume becomes zero.
Show Answer & Explanation
Correct Answer: B
According to Boyle's Law, compressing a gas at constant temperature decreases its volume.
Q4
Medium
According to Boyle's Law, what happens to the volume of a gas when the pressure is doubled at constant temperature?
A.
Volume halves
B.
Volume doubles
C.
Volume remains constant
D.
Cannot be determined
Show Answer & Explanation
Correct Answer: A
Boyle's Law states that pressure and volume are inversely proportional at constant temperature. If pressure doubles, volume must halve.
Q5
Medium
What is the value of R (Ideal Gas Constant) in liter-atmosphere per Kelvin per mole?
A.
0.0821
B.
8.314
C.
1.987
D.
22.414
Show Answer & Explanation
Correct Answer: A
R = 0.0821 L·atm/(K·mol) is the value for the Ideal Gas Constant used in calculations involving gases.
Q6
Medium
A gas occupies a volume of 10 L at 1 atm. What will be its volume at 2 atm, assuming the temperature remains constant?
A.
5 L
B.
10 L
C.
20 L
D.
15 L
Show Answer & Explanation
Correct Answer: A
According to Boyle's Law, V1P1 = V2P2. Here, V2 = (V1P1)/P2 = (10 L * 1 atm)/2 atm = 5 L.
Q7
Medium
Which of the following statements is true about Charles's Law?
A.
Volume is directly proportional to temperature
B.
Pressure is directly proportional to volume
C.
Temperature is inversely proportional to volume
D.
Pressure is constant
Show Answer & Explanation
Correct Answer: A
Charles's Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure.
Q8
Hard
Which of the following gas laws relates pressure and volume at constant temperature?
A.
Charles's Law
B.
Avogadro's Law
C.
Boyle's Law
D.
Ideal Gas Law
Show Answer & Explanation
Correct Answer: C
Boyle's Law states that at constant temperature, the pressure of a gas inversely varies with its volume.
Q9
Hard
A gas occupies 2.0 L at 1.0 atm pressure. What will be its volume at 0.5 atm pressure, assuming constant temperature?
A.
1.0 L
B.
4.0 L
C.
2.5 L
D.
3.0 L
Show Answer & Explanation
Correct Answer: B
According to Boyle's Law (P1V1 = P2V2), if pressure decreases, volume increases. Here, V2 = (P1V1)/P2 = (1 atm * 2 L) / 0.5 atm = 4 L.
Q10
Hard
Which of the following statements is true for real gases?
A.
Real gases obey all gas laws perfectly.
B.
Real gases do not exist.
C.
Real gases behave as ideal gases at high temperature and low pressure.
D.
Real gases have no intermolecular forces.
Show Answer & Explanation
Correct Answer: C
Real gases approximate ideal behavior at high temperatures and low pressures, where intermolecular forces are negligible.
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States of Matter — Class 11 Chemistry Practice Questions Online
This page contains 1897 practice MCQs for the chapter States of Matter in Class 11 Chemistry. The questions are organized by difficulty — 637 easy, 946 medium, 314 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.