MDCAT XI Chemistry Thermochemistry Online Test-2

979

Created on July 17, 2025 By

wordpress.medicoengineer.com

MDCAT XI Chemistry Thermochemistry Online Test-2

📚 Test Details

Subject: Chemistry
Class: 1st year / XI
Chapter: Thermochemistry
Test: 2
Book: Sindh Textbook
Total No. Of MCQs: 50 MCQs
Time Allowed: 50 Minutes
Price: Free

NameEmailPhone Number

1 / 50

1. The standard enthalpy change for a reaction is calculated using:

a) Bond dissociation energies only

b) Hess’s law

c) First law

d) Le Chatelier’s principle

2 / 50

2. A process where no heat is exchanged is called:

a) Isothermal

b) Adiabatic

c) Isobaric

d) Isochoric

3 / 50

3. Energy required to remove an electron from an atom is:

a) Lattice energy

b) Ionization energy

c) Bond enthalpy

d) Electronegativity

4 / 50

4. Which of these processes is endothermic?

a) Condensation

b) Freezing

c) Melting

d) Combustion

5 / 50

5. Which is not involved in thermochemistry?

a) Heat

b) Temperature

c) Moles

d) Speed

6 / 50

6. Which one is a thermodynamic process?

a) Fusion

b) Combustion

c) Expansion

d) All

7 / 50

7. ΔHf° of O₂ (g) is:

a) 0

b) 1

c) -1

d) -298

8 / 50

8. Internal energy is:

a) Path function

b) State function

c) Constant always

d) Not measurable

9 / 50

9. When a system does work on the surroundings:

a) w is positive

b) w is zero

c) w is negative

d) q is negative

10 / 50

10. ΔU = q + w represents:

a) Second law

b) First law

c) Third law

d) Zeroth law

11 / 50

11. Standard enthalpy of combustion is:

a) Always positive

b) Always zero

c) Always negative

d) Sometimes positive

12 / 50

12. A spontaneous exothermic reaction has:

a) ΔH > 0

b) ΔH < 0

c) ΔG > 0

d) No energy change

13 / 50

13. ΔH of sublimation is equal to:

a) ΔH of fusion + vaporization

b) ΔH of formation

c) ΔH of vaporization

d) ΔH of fusion

14 / 50

14. Which reaction has ΔH = 0?

a) Physical change

b) Formation of compound

c) Phase transition

d) Element in standard state

15 / 50

15. The specific heat of water is approximately:

a) 1 J/g·K

b) 4.18 J/g·K

c) 2.0 J/g·K

d) 10.0 J/g·K

16 / 50

16. When bond is formed:

a) Energy is released

b) Energy is absorbed

c) No energy change

d) Energy equals zero

17 / 50

17. ΔH of neutralization is always:

a) Negative

b) Positive

c) Zero

d) Undefined

18 / 50

18. If ΔH > 0 and ΔS > 0, the reaction is:

a) Always spontaneous

b) Never spontaneous

c) Spontaneous at high temp

d) Spontaneous at low temp

19 / 50

19. Lattice energy is:

a) Always positive

b) Always negative

c) May be either

d) Zero

20 / 50

20. Which of the following is NOT a thermochemical equation?

a) Includes physical states

b) Includes enthalpy change

c) Balanced chemical equation

d) Includes catalysts

21 / 50

21. ΔH is greater than ΔU when:

a) Gases are produced

b) Gases are consumed

c) No gas involved

d) Pressure is zero

22 / 50

22. In an exothermic reaction:

a) q is positive

b) q is negative

c) ΔH > 0

d) ΔU increases

23 / 50

23. If temperature of water rises, the reaction is:

a) Endothermic

b) Exothermic

c) Neutral

d) Isothermal

24 / 50

24. Which device is used to measure heat flow?

a) Thermometer

b) Manometer

c) Calorimeter

d) Spectrometer

25 / 50

25. If 2 kJ of heat is supplied to 1 mol of gas at constant volume, ΔU is:

a) 2 kJ

b) 0

c) Depends on work

d) Can’t be determined

26 / 50

26. Which of the following conditions always guarantees a spontaneous reaction?

a) ΔH < 0 and ΔS < 0

b) ΔH 0

c) ΔH > 0 and ΔS > 0

d) ΔH > 0 and ΔS < 0

27 / 50

27. A gas expands from 2 L to 6 L at 1 atm. What is the work done by the gas?

a) -404 J

b) +404 J

c) -202 J

d) +202 J

28 / 50

28. The unit of specific heat capacity is:

a) J

b) J/kg

c) J/kg·K

d) J/mol·K

29 / 50

29. A calorimeter is used to measure:

a) Temperature only

b) Mass

c) Heat of reaction

d) Pressure

30 / 50

30. The energy required to break a bond is:

a) Bond enthalpy

b) Heat of formation

c) Activation energy

d) Lattice energy

31 / 50

31. Combustion reactions are typically:

a) Endothermic

b) Isothermal

c) Exothermic

d) Non-spontaneous

32 / 50

32. Which is exothermic?

a) Evaporation

b) Freezing

c) Boiling

d) Melting

33 / 50

33. For a reaction at constant pressure, the heat change is:

a) ΔU

b) ΔH

c) Qv

d) W

34 / 50

34. Heat capacity is defined as:

a) Heat required to raise temp of 1 mol by 1°C

b) Heat required to raise temp of a substance by 1°C

c) Heat released during combustion

d) None

35 / 50

35. Which has the highest enthalpy?

a) Solid

b) Liquid

c) Gas

d) Plasma

36 / 50

36. The heat required to change one mole of solid to liquid at its melting point is:

a) Heat of vaporization

b) Heat of formation

c) Heat of fusion

d) Heat of combustion

37 / 50

37. Standard enthalpy change of formation of an element in its most stable form is:

a) 0

b) 1

c) -1

d) +1

38 / 50

38. Enthalpy change of neutralization of strong acid and strong base is approximately:

a) 13.7 kJ

b) -57kj

c) 100kj

d) 0

39 / 50

39.

Hess’s Law is based on

a) Conservation of energy

b) Law of definite proportions

c) Le Chatelier’s principle

d) Law of multiple proportions

40 / 50

40. Heat transferred at constant volume equals:

a) ΔH

b) ΔG

c) ΔU

d) Qp

41 / 50

41. If a chemical reaction releases 500 kJ of heat, it is:

a) Endothermic

b) Thermoneutral

c) Exothermic

d) Non-spontaneous

42 / 50

42. ΔH = ΔU + PΔV applies under:

a) Constant pressure

b) Constant volume

c) Adiabatic conditions

d) Isothermal conditions

43 / 50

43. Which law is related to the conservation of energy?

a) Hess's law

b) First law of thermodynamics

c) Second law of thermodynamics

d) Boyle’s law

44 / 50

44. Which one is not an extensive property?

a) Enthalpy

b) Internal energy

c) Temperature

d) Heat capacity

45 / 50

45. In an endothermic reaction:

a) Heat is released

b) ΔH is negative

c) Surroundings get hot

d) Heat is absorbed

46 / 50

46. The heat content of a system at constant pressure is known as:

a) Internal energy

b) Work

c) Enthalpy

d) Entropy

47 / 50

47. A reaction is exothermic if:

a) ΔH is positive

b) ΔH is zero

c) ΔH is negative

d) ΔG is positive

48 / 50

48. The SI unit of enthalpy is:

a) cal

b) kcal

c) J

d) kJ/mol

49 / 50

49. Which of the following is a state function?

a) Heat

b) Work

c) Enthalpy

d) Path

50 / 50

50. q = mcΔT is used to calculate:

a) Heat transferred

b) Enthalpy change

c) Entropy

d) Work

Instructions:

Most Important: Please wait a few seconds after clicking the see results/ test submit button. Don’t double-click or refresh the page.
Open in Chrome browser (recommended)
Don’t refresh the page during the test
This free online test will remain open for the whole mdcat session.
Your score will be shown on the screen after you submit the test
You can attempt the test anytime, anywhere
Join our WhatsApp Group: Click here
For Any Information, contact us via our Facebook Page

Privacy Notice:
Your name may appear on the leaderboard. If you are concerned about this, you may choose not to use your real name.

Leaderboard

Rank	Name	Score (%)
1	Amjad Ali	100%
1	Mkaran	100%
1	anam	100%
1	Silent killer	100%
1	....	100%
1	Pre.	100%
2	Fatima Aa	98%
2	..	98%
2	Jagmal singh	98%
2	Mohit	98%
2	Naresh Kumar	98%
3	nn	96%
3	Shoaib Jamali	96%
3	.	96%
3	U	96%
3	chanchal	96%
3	Jagmal singh	96%
4	Aitzaz Jakhrani Jakhrani Baloch	94%
4	.	94%
4	Ayesha	94%
4	Muhammad Yaseen Abdul Latif	94%
4	Ali	94%
4	Sadia	94%
4	Naira	94%
4	Huda	94%
4	Pawan	94%
4	Sadiq	94%
5	Saidii	92%
5	Poorantt	92%
5	Izza butt	92%
5	vishvas	92%
5	faiqa	92%
5	Khalid Ali Jalalani	92%
5	Ayesha	92%
5	Manjeet Kumar	92%
5	Ftg	92%
5	Aliza	92%
5	e	92%
5	shashi	92%
5	Owais raza	92%
5	rfy	92%
5	Najam	92%
5	S. Fatima	92%
5	Shad	92%
6	M	90%
6	Kareem bux	90%
6	......	90%
6	Sm	90%
6	Javi	90%
6	Riya	90%

MDCAT XI Chemistry Thermochemistry Online Test-2

📚 Test Details

Instructions:

Quick Links

Help

pOPULAR Posts

📚 Test Details

Instructions:

Related Posts

Quick Links

Help

pOPULAR Posts