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Class 10th science quiz contest of 2025

Time: 30 Minutes for 20 Question.

Class 10th Science Monthly Quiz Challenge

The number of attempts remaining is 1

1 / 20

1. pH value less than 7 indicates that the solution is –

Acidic

Basic

Neutral

No effect

2 / 20

2. The decomposers in an ecosystem:

Convert organic material to inorganic forms

Convert inorganic material to simpler forms

Convert inorganic material into the organic compound

Do not break down the organic compound

3 / 20

3. What is the chemical formula of POP (Plaster of Paris)?

CaSO4.2H2O

CaSO4.3H2O

CaSO4.1/2H2O

CaCO3.1/2H2

4 / 20

4. The male reproductive parts of a flower, the stamens, are collectively known as

Androecium

Filament

Anther

Gynoecium

5 / 20

5. Unit of electric power may also be expressed as

Volt-ampere

Kilowatt-hour

Watt second

Joule second

6 / 20

6. IUCD is for

Vegetative propagation

Contraception

Increasing fertility

Avoiding miscarriage

7 / 20

7. Which of the following is the most reactive element of group 17?

Oxygen

Sodium

Fluorine

Magnesium

8 / 20

8. Which statement shows the interaction of an abiotic component with a biotic component in an ecosystem?

A grasshopper feeding on a leaf

Rainwater running down into the lake

An earthworm making a burrow in the soil

A mouse fighting with another mouse for food

9 / 20

9. At what temperature is gypsum heated to form Plaster of Paris?

35°C

70°C

80°C

100°C

10 / 20

10. What is the other name for group 18th elements?

Noble gases

Alkali metals

Alkali earth metals

Halogens

11 / 20

11. Two devices are connected between two points, say A and B, in parallel. The physical quantity that will remain the same between the two points is

Current

Voltage

Resistance

None of these

12 / 20

12. What happens to the electropositive character of elements on moving from left to right in a periodic table?

Increase

Decreases

First increases, then decreases

First decreases, then increases

13 / 20

13. Which Acid is present in Tomato?

Citric Acid

Oxalic Acid

Lactic Acid

HCl

14 / 20

14. The manufacturing of Chlorofluorocarbons free refrigerators is mandatory throughout the world. How does this help prevent ozone depletion?

This will help convert oxygen molecules into ozone

This will help convert the CFCs into ozone molecules

This will reduce the production of CFCs from oxygen molecules

This will reduce the release of CFCs that reacts with ozone molecules

15 / 20

15. Which of the following are environment-friendly practices?

Carrying a cloth bag to put purchases while shopping.

Switching off unnecessary lights and fans

Walking to school instead of getting your mother to drop you on her scooter

All of the above

16 / 20

16. What is the relationship between resistance and current?

They are directly related to each other

They are inversely related to each other

The resistance has a greater magnitude than the current

The current has a greater magnitude than the resistance

17 / 20

17. Which of the following forms the basis of the modern periodic table?

Atomic mass

Atomic number

Number of nucleons

All of the above

18 / 20

18. When a base reacts with a metal, it forms a salt, and hydrogen gas is released. By what method can the presence of hydrogen be detected?

by water

by litmus paper

by methyl orange

by a burning candle

19 / 20

19. Which group elements are called transition metals?

Group number 1 to 2

Group number 13 to 18

Group number 3 to 12

Group number 1 to 8

20 / 20

20. The amount of energy that flows from one trophic level to another in a food chain is

10%

20%

15%

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Class 10th science quiz contest of 2025

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