Thermo-Chemistry Online Mcqs Test

Q: How can I prepare for Thermo-Chemistry Online Mcqs Test?

You can prepare for Thermo-Chemistry Online Mcqs Test by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. Enthalpy of combustion for food, fuel and other compounds can be measured accurately by

Answer

Bomb Calorimeter

Answer

Thermometer

Answer

Glass Calorimeter

Question 2

2. System in which there is no exchange of matter, work or energy from surroundings is

Answer

Isothermal

Question 3

3. In order to decompose 9 g of water 142.5 kJ of heat is required. Hence enthalpy of formation of water is

Question 4

4. Most of the reactions which give stable products are

Answer

Exothermic

Answer

None of these

Answer

Endothermic

Answer

Isothermal

Question 5

5. One of the statement about Born Haber cycle is correct. Which is that statement?

Answer

The lattice energy of the crystalline substances can be calculated easily

Answer

Born Haber cycle is different from Hess’s law

Answer

Heat of formation of the product and lattice energy of the substance can be calculated simultaneously

Answer

The energy change in a cyclic process is not zero

Question 6

6. The net change in energy in a chemical reaction is same whether it takes place directly or indirectly is

Answer

Graham’s law

Answer

Henry’s law

Answer

Charles’s law

Answer

Hess’s law

Question 7

7. Which one is not a state function?

Answer

Internal energy

Answer

Gibbs free energy

Question 8

8. When a bond breaks

Answer

No change in heat contents takes place

Answer

Heat is evolved

Answer

Heat is absorbed

Answer

Temperature increases

Question 9

9. The enthalpies of all elements in their standard states are

Question 10

10. Evaporation of water is

Answer

An exothermic change

Answer

A process accompanied by chemical reaction

Answer

An endothermic change

Answer

A process where no heat changes occur

Question 11

11. The law of Lavoisier and Laplace illustrates

Answer

Equivalence of mechanical and thermal energy

Answer

The principle of conservation of matter

Answer

The principle of conservation of energy

Answer

Equivalent of mechanical and chemical energy

Question 12

12. For a reaction to occur spontaneously

Answer

∆ H must be positive

Answer

∆ H must be unity

Answer

∆ H must be zero

Answer

∆ H must be negative

Question 13

13. Total energy of a system is

Answer

P.E + heat energy

Answer

P.E + mechanical energy

Answer

K.E + heat energy

Question 14

14. Which statement describes characteristics of an endothermic reaction?

Answer

The sign of H is positive, and the products have less potential energy than the reactants

Answer

The sign of H is negative, and the products have more potential energy than the reactants

Answer

The sign of H is negative, and the products have less potential energy than the reactants

Answer

The sign of H is positive and the products a have more potential energy than the reactant

Question 15

15. A material or a collection of materials which is under study is called

Answer

Surrounding

Answer

Any substance

Answer

State function

Question 16

16. If coefficients of a chemical equation are doubled, the enthalpy change will

Answer

None of these

Answer

Not change

Question 17

17. ______ is the study about energy of a chemical system

Answer

Thermochemistry

Answer

Thermodynamics

Answer

Stoichiometry

Question 18

18. Enthalpy of a reaction can be measured by

Answer

Thermometer

Answer

Glass calorimeter

Question 19

19. Quantity of heat evolved or absorbed during reaction measure according to

Answer

∆H = ∆E + P∆V

Answer

Q = m x X x ∆ T

Answer

P∆V + nRT

Answer

∆E = q + w

Question 20

20. The apparatus used to measure the enthalpy of combustion of a substance is

Answer

Copper calorimeter

Answer

Glass calorimeter

Answer

Bomb calorimeter

Question 21

21. When enthalpy of reactants is higher than products, then reaction will be

Answer

Non-spontaneous

Answer

Endothermic

Answer

Exothermic

Answer

Spontaneous

Question 22

22. An adiabatic expansion of an ideal gas always has

Answer

Decrease in temperature

Question 23

23. Form the above data, the standard heat of formation of KOH in kcal mol¯¹ is

Answer

– 68 + 48 – 14

Answer

– 68 – 48 + 14

Answer

68 – 48 + 14

Answer

68 + 48 + 14

Question 24

24. A chemist heated a balloon by supplying 600 J of heat. The balloon expands doing 200 J of work against the atmospheric pressure. The change in internal energy of

Question 25

25. The enthalpies of combustion of carbon and carbon monoxide are -390 kJ mol¯¹ and -278 kJ mol¯¹ respectively. The enthalpy of formation of carbon monoxide is

Answer

-112 kJ mol¯¹

Answer

668 kJ mol¯¹

Answer

-668 kJ mol¯¹

Answer

112 kJ mol¯¹

Question 26

26. Endothermic changes are indicated through

Answer

Breaking of chemical bonds

Answer

Burning of carbon

Answer

Making of chemical bond

Answer

All of these

Question 27

27. The value of ∆Hо₋н is 109 kcal mol¯¹. Then formation of one mole of water in gaseous state form H(g) and O(g) is accompanied by

Answer

Release of 109 kcal of energy

Answer

Unpredictable

Answer

Release of 218 kcal of energy

Answer

Absorption of 218 kcal of energy

Question 28

28. Which one is not state function?

Answer

Gibbs free energy

Answer

Internal energy

Question 29

29. What would be the heat released when an aqueous solution containing 0.5 mole of HNO₃ is mixed with 0.3 mol of OH¯ (enthalpy of neutralization is -57.1 kJ)

Question 30

30. The best characteristic of spontaneous reactions among the following is that

Answer

None of these

Answer

It is irreversible

Answer

It is reversible

Answer

It is not irreversible

Question 31

31. Which type of reactions cannot occur spontaneously?

Answer

Both a and b

Answer

Endothermic

Answer

Exothermic

Question 32

32. Unit of heat is SI system is

Question 33

33. C (diamond) → C(Graphite), ∆ H = -ve. This show that

Answer

Both are equally stable

Answer

Stability cannot to predicated

Answer

Graphite is more stable than diamond

Answer

Graphite has more energy than diamond

Question 34

34. An exothermic reaction is one in which the reacting substances

Answer

Are at a higher temperature than the products

Answer

Have more energy than the products

Answer

Have less energy than the products

Answer

Have the same energy as the products

Question 35

35. For a system in equilibrium, ∆ G = 0, under conditions of constant

Answer

Temperature and volume

Answer

Energy and volume

Answer

Temperature and pressure

Answer

Pressure and volume

Question 36

36. Hess’s law deals with

Answer

Equilibrium constant

Answer

Rate of reaction

Answer

Changes in heat or reaction

Answer

Influence of pressure on volume of a gas

Question 37

37. For the reaction NaOH + HCl → NaCl + H₂O the change in enthalpy is called

Answer

Heat of sublimation

Answer

Heat of reaction

Answer

Heat of neutralization

Answer

Heat of combustion

Question 38

38. A macroscopic property of a system which describes the initial and final state of the system is called

Answer

Energy of the system

Answer

Physical property

Answer

State function

Answer

Chemical property

Question 39

39. Which of the following is not correct?

Answer

Neutralization is always exothermic

Answer

Dissolution on NH₄Cl in excess of water is an endothermic process

Answer

The absolute value of enthalpy (H) can be determined experimentally

Answer

The heat of reaction at constant volume is denoted by ∆E.

Question 40

40. The branch of chemistry which deals with thermal energy change in chemical reaction is called

Answer

Chemical kinetics

Answer

Thermodynamics

Answer

Thermochemistry

Question 41

41. The reaction is spontaneous if the cell potential is

Question 42

42. Which of the following units represents largest amount of energy?

Answer

Electron vol

Question 43

43. If internal energy of the system is increased

Answer

Chemical reaction may take place

Answer

Temperature of the system may rise

Answer

Change in state of the system is increased

Question 44

44. If at 298 K the bond energies of C-H, C-C, C=C and H-H bonds are respectively 414, 347, 615 and 435 kJ mol¯¹, the value of enthalpy change for the reaction H₂C = CH₂(g) + H₂(g) → H₃C – CH₃(g) at 298 K will be

Question 45

45. The energy required to break 1 mole of bonds to form neutral atom is

Answer

Bond length

Answer

Bond energy

Answer

Bond strength

Answer

None of these

Question 46

46. What is the entropy change (in JK¯¹ mol¯¹) when one mole of ice is converted into water at 0°C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol¯¹ at 0°C)

Question 47

47. In measurement of melting point of solid, the leaker used will be

Answer

Surrounding

Question 48

48. If internal energy of a system is increased

Answer

Temperature of the system may rise

Answer

Chemical reaction can take place

Answer

Change in state of system can occur

Question 49

49. Heat exchanged in a chemical reaction at constant temperature and pressure is called

Answer

Enthalpy change

Answer

Internal energy change

Answer

Entropy change

Answer

Free energy change

Question 50

50. The enthalpy of formation of carbon monoxide will be

Answer

2x – y/2

Answer

Y – 2x/2

Question 51

51. Enthalpy of formation of HF and HCl are – 161 kJ and -92 kJ respectively. Which of the following statements is incorrect?

Answer

HF and HCl are endothermic compounds

Answer

HCl is more stable than HF

Answer

The affinity of fluorine to hydrogen is greater than the affinity of chlorine to hydrogen

Answer

HF is more stable than HCl

Question 52

52. One mole of an ideal gas expands isothermally to ten times its original volume. The change in entropy is

Question 53

53. Calorie is equivalent to

Question 54

54. The enthalpies of combustion of carbon and carbon monoxide are -383.5 and -283 kJ mol¯¹ respectively. The enthalpy of formation of carbon monoxide per mole is

Question 55

55. Total energy of a system is

Answer

P.E, + K.E.

Answer

K.E, + heat energy

Answer

P.E, + mechanical energy

Answer

P.E. + heat energy

Question 56

56. In general, for exothermic reactions to be spontaneous

Answer

Temperature has no effect

Answer

Temperature should be zero

Answer

Temperature should be low

Answer

Temperature should be high

Question 57

57. All the naturally occurring processes proceed spontaneously in a direction which lead to

Answer

Decrease of free energy

Answer

Increase of free energy

Answer

Decrease of entropy

Answer

Increase of enthalpy

Question 58

58. Which law among the following has same net change whether it takes place directly or indirectly?

Answer

Boyle’s law

Answer

Graham’s law

Answer

Hess’s law

Answer

Henry’s law

Question 59

59. Choose the S.I units for molar heat capacity among the following

Answer

Joule deg¯¹ mol¯¹

Answer

Joule deg¯¹ atom¯¹

Answer

Joule deg¯¹ Kg¯¹

Answer

Joule cm¯¹ deg¯¹

Question 60

60. The molar heat capacity of water at constant pressure, Cᵨ, is 75 JK¯¹ mol¯¹. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is

Question 61

61. The branch of science which deals with energy transformation is known as

Answer

Photochemistry

Answer

Thermochemistry

Answer

Thermodynamics

Question 62

62. The unit which indicates the largest amount of energy is

Answer

Electron – volt

Question 63

63. The S.I unit of heat and energy is

Answer

None of these

Question 64

64. Two fundamental ways to transfer energy are

Answer

Heat and work

Answer

Pressure and volume

Answer

Pressure and temperature

Answer

Heat and volume

Answer 171

Work done is independent of its path

Answer 172

An equivalent amount of heat energy can neither be created nor destroyed

Answer 173

One form of energy can be transferred to an equivalent amount of the kind of energy

Answer 174

Continuous production of mechanical work without supplying an equivalent amount of heat energy

Answer 175

Insufficient data

Answer 176

9.75 JK¯¹

Answer 177

11.272 JK¯¹

Answer 178

2.33 JK¯¹

Answer 179

Cannot be predicted

Answer 180

2 x 57.3 kJ

Answer 181

386 KJ/mole

Answer 182

190 KJ/mole

Answer 183

395 KJ/mole

Answer 184

-27 KJ/mole

Answer 185

Irreversible process

Answer 186

None of these

Answer 187

Spontaneous process

Answer 188

Non spontaneous

Answer 189

Reversible

Answer 190

Spontaneous

Answer 191

Irreversible

Answer 192

Non-spontaneous

Answer 193

Both a and b

Answer 194

Products is more than that of reactants

Answer 195

Reactants and products are equal

Answer 196

Reactants is more than that of products

Answer 197

Endothermic process

Answer 198

Chemical process

Answer 199

Physical process

Answer 200

Biochemical process

Answer 201

Both a and b

Answer 202

Endothermic

Answer 203

Decomposition

Answer 204

Exothermic

Answer 205

A lowering of energy

Answer 206

No energy change

Answer 207

A lowering of free energy

Answer 208

An increase in internal energy

Answer 209

70960 calories

Answer 210

71030 calories

Answer 211

+70 calories

Answer 212

-70 calories

Answer 213

Heat is evolved

Answer 214

Heat is converted into mechanical work

Answer 215

Heat is converted into electricity

Answer 216

Heat is absorbed

Answer 217

Exothermic

Answer 218

Spontaneous

Answer 219

Endothermic

Answer 220

Non-spontaneous

Answer 221

Free energy of reaction

Answer 222

Entropy of reaction

Answer 223

Heat and volume

Answer 224

Pressure and volume

Answer 225

Pressure and temperature

Answer 226

Heat and work

Answer 227

Exothermic

Answer 228

Endothermic

Answer 229

Photochemical

Answer 230

-231.6 kcal mol¯¹

Answer 231

-94.0 kcal mol¯¹

Answer 232

+64.8 kcal mol¯¹

Answer 233

+21.4 kcal mol¯¹

Answer 234

Second law

Answer 235

Zeroth law

Answer 236

Burning of coal is and endothermic process

Answer 237

Burning of coal in air releases large amount of energy

Answer 238

Coal and air react giving a reversible reaction

Answer 239

None of these

Answer 240

Electron – volt

Answer 241

Water equivalent

Answer 242

None of these

Answer 243

Specific heat

Answer 244

Thermal capacity

Answer 245

Temperature

Answer 246

-523.3 kJ mol¯¹

Answer 247

-339.3 kJ mol¯¹

Answer 248

-439.3 kJ mol¯¹

Answer 249

-221.1 kJ mol¯¹

Answer 250

2 kg H₂O

Answer 251

1 kg H₂O

Answer 252

3 kg H₂O

Answer 253

4 kg H₂O

Answer 254

Liquid-liquid

Answer 255

Solid-solid

Answer 256

Solid-liquid

Answer 257

Equal to zero

Answer 258

Unpredictable

Answer 259

Remains same

Answer 260

Remains constant

Answer 261

Heat of neutralization

Answer 262

Hat of formation

Answer 263

Enthalpy of reaction

Answer 264

Heat of combustion

Answer 265

∆H = ∆E – d

Answer 266

∆H = ∆E + Pv

Answer 267

∆H = ∆E – PV

Answer 268

∆H = ∆E + d

Answer 269

Respiration

Answer 270

Thermal decomposition

Answer 271

Combustion

Answer 272

Neutralization

Answer 273

Exothermic

Answer 274

Endothermic

Answer 275

Non-spontaneous

Answer 276

Spontaneous

Answer 277

Ice will melt

Answer 278

Ice will sublime

Answer 279

Water will vaporize

Answer 280

Water will freeze

Answer 281

State function

Answer 282

Surrounding

Answer 283

Vibrational motion

Answer 284

Rotational motion

Answer 285

Translational motion

Answer 286

The sum of all motions which are possible

Answer 287

It has a large + ve value for enthalpy change

Answer 288

It has small + ve value for enthalpy change

Answer 289

It has a large – ve value for the entropy change

Answer 290

It has a + ve value for the entropy change and a – ve value for the enthalpy change

Answer 291

Both a and b

Answer 292

Endothermic

Answer 293

Exothermic

Total Questions:	108
Time Allowed:	60 Minutes
Total Marks:	108
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Chemistry Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Chemistry Interview Question Answer

Thermo-Chemistry Online Mcqs Test

Important Thermo Chemistry Question and Answer

Thermo Chemistry Practice Test Online With Explanation

Chemistry

How to Score High in Thermo-Chemistry Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Mustansar Khan

Leave a Reply Cancel reply

Important Thermo Chemistry Question and Answer

Thermo Chemistry Practice Test Online With Explanation

Chemistry

How to Score High in Thermo-Chemistry Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Latest Updates

Mustansar Khan

Leave a Reply Cancel reply