Live Education Quiz

1

Which law explains constant heat change?

A Boyle’s law B Hess’s law C Charles’s law D Dalton’s law

2

What is activation energy?

A Energy released B Minimum energy to start a reaction C Energy of products D Energy at room temperature

3

Which of the following is an example of oxidation?

A Zn → Zn2+ + 2e− B Cu2+ + 2e− → Cu C Cl2 + 2e− → 2Cl− D O2 + 4e− → 2O2−

4

Calorimetry is the study of:

A Mass change B Volume change C Heat change D Pressure change

5

Photosynthesis is an example of:

A Exothermic reaction B Endothermic reaction C Neutral reaction D Decomposition

6

Which of the following is an application of electrochemistry?

A Distillation B Electrolysis C Filtration D Evaporation

7

Energy absorbed during bond breaking is:

A Released B Ignored C Stored D Required

8

Which type of reaction absorbs heat?

A Exothermic B Combustion C Endothermic D Oxidation

9

Oxidation is the process of:

A Gain of electrons B Loss of electrons C Gain of neutrons D Loss of protons

10

What happens to surroundings in an exothermic reaction?

A They cool down B They gain heat C No change D They lose mass

11

Reduction is defined as:

A Loss of electrons B Gain of electrons C Loss of oxygen D Gain of protons

12

Which cell is used in electroplating?

A Voltaic cell B Dry cell C Electrolytic cell D Fuel cell

13

Which symbol is used for enthalpy?

A E B H C Q D T

14

The main purpose of electroplating is to:

A Increase weight B Prevent corrosion and enhance appearance C Reduce conductivity D Increase rusting

15

Which type of reaction releases heat?

A Endothermic B Exothermic C Neutral D Physical

16

What is the oxidation state of Cl in NaCl?

A +1 B 0 C -1 D -2

17

Electroplating is used to:

A Remove rust B Protect metals and improve appearance C Increase corrosion D Purify metals

18

Which energy change is shown by ΔH > 0?

A Exothermic B Endothermic C Neutral D Spontaneous

19

Which metal is commonly used for sacrificial protection of iron?

A Copper B Silver C Zinc D Gold

20

Calorimeter is used to measure:

A Temperature only B Heat of reaction C Pressure change D Volume change

21

What does ΔH represent?

A Change in pressure B Change in temperature C Change in enthalpy D Change in mass

22

Energy released during bond formation is:

A Absorbed B Released C Lost D Stored

23

Which type of cell requires an external power source?

A Voltaic cell B Galvanic cell C Electrolytic cell D Dry cell

24

Electrochemistry mainly deals with:

A Heat and energy B Electricity and chemical reactions C Light and atoms D Pressure and volume

25

Which statement best describes a redox reaction?

A Only oxidation occurs B Only reduction occurs C Oxidation and reduction occur together D No electron transfer occurs

26

Which reaction needs continuous energy supply?

A Exothermic B Endothermic C Neutral D Fast reaction

27

The cathode in a galvanic cell is:

A Negatively charged B Neutral C Positively charged D Insulated

28

An oxidizing agent is a substance that:

A Loses electrons B Gains electrons C Gives electrons to others D Prevents oxidation

29

Which energy change is shown by ΔH < 0?