MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 84 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following is reverse of evaporation? |
| A. | Melting |
| B. | Freezing |
| C. | dangerous animal |
| D. | Transpiration |
| E. | None of these |
| Answer» D. Transpiration | |
| 2. |
A condition occurs due to very less or no rainfall over a long period of time. |
| A. | Flood |
| B. | Earthquake |
| C. | goats |
| D. | Drought |
| E. | None of these |
| Answer» E. None of these | |
| 3. |
Process which is used to get salt from sea water is: |
| A. | Freezing |
| B. | Evaporation |
| C. | Pride |
| D. | Photosynthesis |
| E. | None of these |
| Answer» C. Pride | |
| 4. |
Organic wastes decomposes in presence of: |
| A. | Bacteria and Virus |
| B. | Mosquitoes and bacteria |
| C. | Fish |
| D. | Bacteria and fungi |
| E. | None of these |
| Answer» E. None of these | |
| 5. |
Liquid waste collected from houses is known as: |
| A. | Effluent |
| B. | Smoke |
| C. | 0 |
| D. | Sewage |
| E. | None of these |
| Answer» E. None of these | |
| 6. |
Which among the following is a better manure for growing plants? |
| A. | Compost is a better manure than Vermicompost. |
| B. | Vermicompost is a better manure than compost. |
| C. | \[Ne,{{F}^{-}}\] |
| D. | All the above |
| E. | None of these |
| Answer» C. \[Ne,{{F}^{-}}\] | |
| 7. |
______ Waste will not decay and mix with soil. |
| A. | Biodegradable |
| B. | Non-biodegradable |
| C. | \[C{{O}^{+2}}\] |
| D. | Paper |
| E. | None of these |
| Answer» C. \[C{{O}^{+2}}\] | |
| 8. |
A low-lying open area of ground where the garbage is dumped. |
| A. | Vermicompost |
| B. | Landfill |
| C. | mercury |
| D. | Garbage |
| E. | None of these |
| Answer» C. mercury | |
| 9. |
Small organisms living in burrows come out of soil in rainy season for: |
| A. | Respiration |
| B. | Playing |
| C. | all of them are metallic elements |
| D. | Water cycle |
| E. | None of these |
| Answer» B. Playing | |
| 10. |
Which of the following characteristics belong to oxygen gas? |
| A. | Colourless |
| B. | Odourless |
| C. | 8 |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 11. |
Harmful components of air are: |
| A. | Oxygen and carbon dioxide |
| B. | Carbon dioxide and neon |
| C. | show variable oxidation state of \[-1,+1,+3,+5\]and +7 in their various compounds |
| D. | Smoke and dust |
| E. | None of these |
| Answer» E. None of these | |
| 12. |
Consumption of oxygen by respiration and burning and its production by Photosynthesis is called: |
| A. | Water cycle |
| B. | Air cycle |
| C. | \[Be\] |
| D. | Life cycle |
| E. | None of these |
| Answer» D. Life cycle | |
| 13. |
About one-fifth of air is _____. |
| A. | Nitrogen |
| B. | Oxygen |
| C. | remains same |
| D. | Helium |
| E. | None of these |
| Answer» C. remains same | |
| 14. |
Which gas is the main component of ammonia gas? |
| A. | Oxygen |
| B. | Hydrogen |
| C. | chalcogens |
| D. | Both [b] and [c] |
| E. | None of these |
| Answer» D. Both [b] and [c] | |
| 15. |
Which one among the following is present in trace amount in the air? |
| A. | Nitrogen |
| B. | Oxygen |
| C. | sodium |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 16. |
Density of water at \[4{}^\circ C\]is: |
| A. | \[2g/c{{m}^{3}}\] |
| B. | \[1g/c{{m}^{3}}\] |
| C. | increases both in period and group |
| D. | \[0.01g/c{{m}^{3}}\] |
| E. | None of these |
| Answer» C. increases both in period and group | |
| 17. |
When water present in a beaker is heated, the volume of water will: |
| A. | Decrease |
| B. | Increase |
| C. | B |
| D. | All the above |
| E. | None of these |
| Answer» C. B | |
| 18. |
Name the natural calamity which is caused due to excess of water. |
| A. | Drought |
| B. | Flood |
| C. | Venus |
| D. | volcanic eruption |
| E. | None of these |
| Answer» C. Venus | |
| 19. |
Most plants are grown in this layer of soil. This layer of soil is: |
| A. | Subsoil |
| B. | Topsoil |
| C. | Varahamihira |
| D. | Tough soil |
| E. | None of these |
| Answer» C. Varahamihira | |
| 20. |
Which of the following is not a type of soil? |
| A. | Sandy |
| B. | Loamy |
| C. | Mars |
| D. | Topsoil |
| E. | None of these |
| Answer» E. None of these | |
| 21. |
Which among the following is not true about air? |
| A. | Air is a mixture of gases. |
| B. | We can see air. |
| C. | Z completes a rotation around X in about 28 days. |
| D. | Air contains dust particles. |
| E. | None of these |
| Answer» C. Z completes a rotation around X in about 28 days. | |
| 22. |
Soil is formed by which of the following process? |
| A. | Deforestation |
| B. | Water cycle |
| C. | It is located between Venus and Jupiter in our Solar System. |
| D. | Afforestation |
| E. | None of these |
| Answer» D. Afforestation | |
| 23. |
Which one of the following involves all the three states of matter? |
| A. | Food chain |
| B. | Food web |
| C. | a B |
| D. | Forest cycle |
| E. | None of these |
| Answer» D. Forest cycle | |
| 24. |
One of the best solutions to get rid of non-biodegradable wastes is _____. |
| A. | Burning |
| B. | Dumping |
| C. | Crescent |
| D. | Recycling |
| E. | None of these |
| Answer» E. None of these | |
| 25. |
On a ___ day sun appears to hide. |
| A. | Sunny day |
| B. | Cloudy day |
| C. | 2 and 3 only |
| D. | All the above |
| E. | None of these |
| Answer» C. 2 and 3 only | |
| 26. |
____ is caused when it does not rain for long, so crops cannot grow. |
| A. | Flood |
| B. | Earth |
| C. | R |
| D. | Volcano |
| E. | None of these |
| Answer» D. Volcano | |
| 27. |
Match the following: (i) Sun [A] Moving air (ii) Wind [B] Season (iii) Spring [C] Keeps changing (iv) Weather [D] Heats up water from rivers |
| A. | (i - C), (ii - D), (iii - B), (iv - A) |
| B. | (i - D), (ii - A), (iii - B), (iv - C) |
| C. | Condensation |
| D. | (i - B), (ii - C), (iii - D), (iv - A) |
| E. | None of these |
| Answer» C. Condensation | |
| 28. |
I am a tasteless and odourless liquid. Who am I? |
| A. | Milk |
| B. | Water |
| C. | Tsunami |
| D. | Petrol |
| E. | None of these |
| Answer» C. Tsunami | |
| 29. |
Which fuel causes less pollution among the following? |
| A. | Petrol |
| B. | Diesel |
| C. | Melting |
| D. | Kerosene |
| E. | None of these |
| Answer» D. Kerosene | |
| 30. |
We can keep the environment clean by: |
| A. | Disposing the waste material in rivers. |
| B. | Littering here and there. |
| C. | Algae and fungi |
| D. | Using plastic bags. |
| E. | None of these |
| Answer» D. Using plastic bags. | |
| 31. |
Air does not contain this. |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Smog |
| D. | Sugar |
| E. | None of these |
| Answer» E. None of these | |
| 32. |
Coldest time of the year is______. |
| A. | Winter |
| B. | Summer |
| C. | Both contains equal nutrients. |
| D. | Monsoon |
| E. | None of these |
| Answer» B. Summer | |
| 33. |
Which among the following is not a season? |
| A. | Summer |
| B. | Autumn |
| C. | Vermicompost |
| D. | Spring |
| E. | None of these |
| Answer» D. Spring | |
| 34. |
Which factor among the following is responsible for the changes in weather? |
| A. | Sun |
| B. | Water vapours |
| C. | Compost |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 35. |
Storm is an extreme weather condition with: |
| A. | Moving air only |
| B. | Blowing wind only |
| C. | Performing photosynthesis |
| D. | Breeze only |
| E. | None of these |
| Answer» D. Breeze only | |
| 36. |
A season in which flowers grow everywhere. |
| A. | Monsoon |
| B. | Autumn |
| C. | Denser than air |
| D. | Winter |
| E. | None of these |
| Answer» D. Winter | |
| 37. |
This rock is mostly used for making buildings. |
| A. | Ruby |
| B. | Diamond |
| C. | Dust and Oxygen |
| D. | Emerald |
| E. | None of these |
| Answer» D. Emerald | |
| 38. |
Which of the following is not included in water cycle? |
| A. | Water |
| B. | Sun |
| C. | Oxygen cycle |
| D. | Rain |
| E. | None of these |
| Answer» F. | |
| 39. |
Which is an abiotic component of the environment? |
| A. | Plants |
| B. | Water |
| C. | Argon |
| D. | Humans |
| E. | None of these |
| Answer» C. Argon | |
| 40. |
The solid waste produced in our houses is called. |
| A. | sewage |
| B. | garbage |
| C. | Nitrogen |
| D. | waste |
| Answer» C. Nitrogen | |
| 41. |
Match the following and select the correct answer.1. SunlightA. to let the smoke go out2. ChimneysB. to sit and enjoy the fresh air and warmth of sunlight3. VerandahC. keeps mosquitoes and flies away4. Wire nettingD. keeps the rooms free from germs |
| A. | 1-A, 2-B, 3-C, 4-D |
| B. | 1-D, 2-C, 3-B, 4-A |
| C. | Green plants need carbon dioxide gas to make food. |
| D. | 1-C, 2-D, 3-B, 4-A |
| Answer» D. 1-C, 2-D, 3-B, 4-A | |
| 42. |
Why are doors very important in a house? |
| A. | They stop cold winds from entering |
| B. | They protect us from animals and thieves |
| C. | Carbon dioxide |
| D. | They support the walls |
| Answer» C. Carbon dioxide | |
| 43. |
Which of the following is used to see disease-causing germs? |
| A. | |
| B. | |
| C. | \[3g/c{{m}^{3}}\] |
| D. | |
| Answer» E. | |
| 44. |
Which of the following actions should NOT be done to keep our surroundings clean? |
| A. | We should use proper latrine system |
| B. | We should not allow dirty water to stagnate around our house |
| C. | Remains the same |
| D. | We should spit in the open |
| Answer» E. | |
| 45. |
Saving electricity is the need of the hour. We can save electricity by |
| A. | Turning on heater during winter to make room warm. |
| B. | Playing loud music for three hours daily. |
| C. | Using LED bulbs. |
| D. | Leaving the lights and fan switched on even when there is no one in the room. |
| Answer» D. Leaving the lights and fan switched on even when there is no one in the room. | |
| 46. |
Raju, a farmer gets his field checked for soil toxicity. The report shows high level of toxic chemicals in his field. How can these toxic chemicals in the soil harm? |
| A. | They change the climate of the area. |
| B. | They are absorbed by food plants grown in the soil making them unfit for consumption. |
| C. | They purify groundwater. |
| D. | They get evaporated in the air causing air pollution. |
| Answer» C. They purify groundwater. | |
| 47. |
By which of the following ways can we reuse water? |
| A. | Use water that is drained out from the washing machine to wash the vegetables. |
| B. | Use water collected from rain to cook. |
| C. | Collect water from leaking taps to water plants. |
| D. | Both (a) and (b) |
| Answer» D. Both (a) and (b) | |
| 48. |
Runoff water from nearby crop fields enters a small lake. How will it affect the lake? |
| A. | It will cause the lake to dry up. |
| B. | It will cause algae to grow in the lake. |
| C. | It will cause the lake to become deeper. |
| D. | It will cause water in the lake to become solid. |
| Answer» C. It will cause the lake to become deeper. | |
| 49. |
Rohan is suffering from jaundice. What could be the possible reason for this? |
| A. | He played in polluted soil. |
| B. | He drank polluted water. |
| C. | He breathed polluted air. |
| D. | All of these |
| Answer» C. He breathed polluted air. | |
| 50. |
Match column I with column II and select the correct option from the given codes. Column I Column II (A) Air pollution (B) Water pollution (C) Soil pollution 1. Asthma 2. Dysentery 3. Barren land 4. Acid rain |
| A. | (a)-1, (b)-2, 4; (c)-3 |
| B. | (a)-1, 2; (b)-4; (c)-3 |
| C. | (a)-1, 4; (b)-2; (c)-3 |
| D. | (a)-4, (b)-1, 2; (c)-3 |
| Answer» B. (a)-1, 2; (b)-4; (c)-3 | |