📝 Short Description:

Prepare for your MDCAT exam with these 20 multiple-choice questions (MCQs) on Gases, designed specifically for students targeting KMU, UHS, and SZABMU medical entrance exams. This collection of questions covers key concepts from gas laws, ideal gas equations, and the behavior of gases under different conditions, all of which are crucial for your understanding of physical chemistry.

These MCQs provide an in-depth look at the relationships between pressure, volume, temperature, and the number of gas molecules, aligned with the latest syllabus for Pakistani MDCAT students. Each question is crafted to test your grasp on the fundamental principles, like Boyle’s Law, Charles’ Law, and Avogadro’s Law. Whether you’re aiming for high scores or just reinforcing your understanding, these questions will help you prepare effectively for the MDCAT 2025.

This question bank is ideal for students looking to solidify their knowledge and improve their problem-solving skills. By practicing these questions, you’ll get closer to achieving your dream of entering a medical college in Pakistan.

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💨 3. Gases

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Name

1 / 20

1. The density of a gas is given by the formula:

D = m/V

D = P × M/(R × T)

D = P × T/V

D = m × R/T

2 / 20

2. The root mean square speed of gas molecules depends on:

The volume of the gas

The temperature of the gas

The pressure of the gas

The number of moles

3 / 20

3. Real gases deviate from ideal behavior at:

Low pressure and high temperature

High pressure and low temperature

Low pressure and low temperature

High pressure and high temperature

4 / 20

4. The Kinetic Molecular Theory explains that gas particles are:

In motion

Stationary

Polar

Attracting each other

5 / 20

5. The Boyle’s Law constant is equal to:

Volume × Pressure

Volume ÷ Pressure

Pressure ÷ Volume

Volume × Temperature

6 / 20

6. A gas behaves ideally at:

High pressure and low temperature

Low pressure and high temperature

High pressure and high temperature

Low pressure and low temperature

7 / 20

7. According to Graham’s Law, the rate of effusion of a gas is inversely proportional to:

Square root of its molar mass

Its temperature

Its pressure

Its volume

8 / 20

8. Gay-Lussac’s Law involves the relationship between the temperature and:

Volume

Pressure

Number of moles

Mass

9 / 20

9. The relationship between pressure and volume of a gas at constant temperature is:

Directly proportional

Inversely proportional

Independent

Exponential

10 / 20

10. The volume of a gas is directly proportional to its temperature at constant:

Mass

Pressure

Volume

Number of moles

11 / 20

11. Graham’s Law of Diffusion explains the relationship between the rates of diffusion of two gases and their:

Masses

Volumes

Temperatures

Molar masses

12 / 20

12. The compressibility factor (Z) for an ideal gas is:

13 / 20

13. Dalton’s Law of Partial Pressures states that the total pressure exerted by a gas mixture is equal to:

The sum of the volumes

The sum of the temperatures

The sum of the individual partial pressures

The sum of the masses

14 / 20

14. The value of R in the ideal gas law is called the universal gas constant, and it is:

0.0821 L·atm/(mol·K)

8.31 J/mol·K

1.00 atm

0.0821 K/mol·L

15 / 20

15. The pressure exerted by a gas is directly proportional to the:

Volume

Temperature

Number of moles

Density

16 / 20

16. Charles’ Law describes the relationship between the volume of a gas and:

Pressure

Temperature

Mass

Number of moles

17 / 20

17. Avogadro’s Law relates volume and:

Pressure

Temperature

Moles of gas

Density

18 / 20

18. The ideal gas equation is represented by:

P = VRT

PV = nRT

P + V = nRT

P = nRT

19 / 20

19. The volume of an ideal gas at STP (Standard Temperature and Pressure) is:

22.4 L

24.0 L

1.0 L

10.0 L

20 / 20

20. Boyle’s Law states that at constant temperature, the pressure of a gas is inversely proportional to its:

Volume

Temperature

Mass

Number of moles

Your score is

Pos.	Name	Score	Duration	Points
1	Nairah	100 %	5 minutes 9 seconds	20
2	Faraz	95 %	2 minutes	19
3	G	95 %	2 minutes 12 seconds	19
4	Awais	95 %	3 minutes 6 seconds	19
5	Arbaz Baloch	95 %	3 minutes 14 seconds	19
6	Zaheer Ahmed	95 %	3 minutes 37 seconds	19
7	Muhammad Alam	95 %	4 minutes 5 seconds	19
8	Kamran	95 %	4 minutes 35 seconds	19
9	Duaa	95 %	5 minutes 26 seconds	19
10	Student	95 %	5 minutes 47 seconds	19
11	....	95 %	6 minutes 16 seconds	19
12	KHR	95 %	6 minutes 34 seconds	19
13	Hururu	90 %	3 minutes 53 seconds	18
14	Sarfraz	90 %	4 minutes 29 seconds	18
15	Ali Abbasi	90 %	5 minutes 25 seconds	18
16	harika	90 %	7 minutes 7 seconds	18
17	Nasarullah Baloch	90 %	7 minutes 18 seconds	18
18	M Ayan	90 %	7 minutes 24 seconds	18
19	Maqsood Baloch	90 %	7 minutes 26 seconds	18
20	Ghulam mustafa	85 %	3 minutes 41 seconds	17
21	Faiza Raees	85 %	4 minutes 40 seconds	17
22	Huzaifa	85 %	7 minutes 49 seconds	17
23	Faizan	85 %	8 minutes 47 seconds	17
24	Abdul Rehman	85 %	13 minutes 53 seconds	17
25	Samra Nazir	85 %	19 minutes 6 seconds	17
26	Hina	80 %	3 minutes 18 seconds	16
27	Faraz	80 %	3 minutes 31 seconds	16
28	Naeem Jatoi	80 %	3 minutes 38 seconds	16
29	......	80 %	6 minutes 41 seconds	16
30	Zara	80 %	7 minutes 41 seconds	16
31	Gulsher Abbas	80 %	10 minutes 2 seconds	16
32	Afzal mumtaz	75 %	4 minutes 47 seconds	15
33	Niaz Muhammad Jamali	75 %	5 minutes 31 seconds	15
34	masroor ahmad	75 %	6 minutes 28 seconds	15
35	Fayaz magsi	75 %	8 minutes 12 seconds	15
36	iqra buriro	75 %	16 minutes 14 seconds	15
37	Iqra Ali	75 %	30 minutes 27 seconds	15
38	M Nasir	70 %	4 minutes 37 seconds	14
39	Remisha	70 %	11 minutes 41 seconds	14
40	sania hanif	65 %	3 minutes 15 seconds	13
41	Aliza	60 %	3 minutes 12 seconds	12
42	Deva	60 %	3 minutes 40 seconds	12
43	Shubham	55 %	6 minutes 13 seconds	11
44	Aiman	40 %	2 minutes 1 seconds	8
45	Sarfraz	10 %	24 seconds	2
46	Faiza	10 %	31 seconds	2
47	Zara	10 %	1 minutes 44 seconds	2
48	Arbaz	5 %	26 seconds	1
49	KHR	5 %	1 minutes 21 seconds	1
50	F	0 %	6 seconds	0
51	Hina	0 %	30 seconds	0
52	Ahtram	0 %	39 seconds	0
53	Maham	0 %	40 seconds	0
54	Faizan	0 %	2 minutes	0

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💨 Gases MDCAT MCQs 2025 – 20 Essential Questions for KMU, UHS & SZABMU Preparation 🌬️📚

📝 Short Description:

🎓 Welcome to Risen Academy – Empowering Your Medical Dreams! 🏥📚

🌟 Why Choose Risen Academy?

📘 What You'll Get

🧠 Extensive MCQs Question Bank

📞 Contact & Support

🌍 Visit Our Website: https://risenacademy.online

🚀 Boost Your Learning with Risen Academy! 🚀

🔍 Discover Our Exclusive Resources

🧠 Extensive Question Bank:

📜 Past Papers for Real Exam Insights:

🔥 Full-Length Practice Tests:

📝 In-Depth Notes:

🤯 Detailed Explanations:

📞 Contact & Support

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