General Science Basic Chemistry Quiz Online Test For Prep Questions with Answers Mcqs

Given over this page is a free online general science quiz which includes important Mcqs questions and answers related to the basic knowledge of Chemistry. All the individuals who are going to appear in any everyday science related written exam or interview are strongly recommended to use our tests as guide for easy and quick preparation.

General Science Basic Chemistry Quiz Online Test For Prep Questions with Answers Mcqs

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Basic Science

1. Ozone is present in which of the following layers of atmosphere:

Troposphere and Stratosphere

Thermosphere

Troposphere and Thermosphere

Mesosphere

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Question 1 of 20

2. In fireworks, the green flame is produced because of:

Mercury

Sodium

Potassium

Barrium

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Question 2 of 20

3. Oxidation involves:

Combustion

Loss of electrons

Gain in electron

Gain of hydrogen

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Question 3 of 20

4. Nameplates made of brass get discoloured in air because of the presence of which of the following gases in the air?

Hydrogen sulphide

Carbon dioxide

Oxygen

Nitrogen

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Question 4 of 20

5. X-rays are produced when a stream of electrons in an X-ray tube?

Noneof these

All of these

Hits the glass wall of the tube

Srikes metal target

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Question 5 of 20

6. Cooking gas is a mixture of which of the following two gases?

Bautane and Propane

Oxygen and Methane

Methane and Carbon dioxide

Oxygen and Nitrogen

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Question 6 of 20

7. The reason for chlorination of water is:

To add minerals

To kill germs

To add taste

To propagate germs

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Question 7 of 20

8. Atom bomb is based on the principal of?

None of these

Nuclear fission

All of these

Nuclear fusion

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Question 8 of 20

9. Which of the following gases is used in fire extinguishers?

Hydrogen

Carbon dioxide

Oxygen

Water vapour

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Question 9 of 20

10. Which group of elements in the periodic table show highest first ionization potential. Elements in the:

Left hand bottom corner

All of these

None of these

Left hand top corner

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Question 10 of 20

11. What is the chemical name of Baking Soda?

Sodium bicarbonate

Sodium Carbonate

Sodium Nitrate

Potassium

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Question 11 of 20

12. In the periodic table, elements have been arranged?

All of these

In order of increasing volume

In order of increasing atomic number

None of these

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Question 12 of 20

13. When radioactive rays are passed through air or any gas, they cause it to:

Ionize

Boil

Evaporate

Freeze

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Question 13 of 20

14. When we move from left to right in second period, the atomic volume of the element?

All of these

Increases

None of these

Increases with constant state

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Question 14 of 20

15. Generally in a given period in the periodic table, as we move from left to right, the electropositive character of elements:

Decreases

Increases

Decreases then Increases

Neither increases nor decreases

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Question 15 of 20

16. Stains of rust from iron on cloth can be removed by:

None of these

Hydrogen peroxide

Alcohol

Oxalic acid

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Question 16 of 20

17. During electrolysis, metals are deposited at the cathode, because the cathode,

None of these

Supplies electrons

Undergoes oxidation

Withdraw electrons

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Question 17 of 20

18. The liberation of energy in sun is due to?

None of these

Fission reaction

All of these

Fusion reaction

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Question 18 of 20

19. Rise in temperature, the conductivity of metals will:

Remains unchanged

Increases

Decreases

None of these

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Question 19 of 20

20. The reaction taking place at anode and cathode are respectively?

Oxidation, reduction

Reduction, hydrolysis

Reduction, Oxidation

None of these

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Question 20 of 20

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