CBSE Class 10 Biology MCQs All Chapters Set 05

Multiple Choice Questions (MCQs) for Class 10 Science: All Chapters

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Multiple Choice Questions

Question 1: Mangrove forests occur in
(a) high mountains
(b) snowy plains
(c) coastal swamps
(d) interior plateaus
Show Answer & Explanation

Answer: (c) coastal swamps

Explanation:
1. Mangrove forests occur in coastal swamps.

Question 2: Gir National Park is in
(a) Gujarat
(b) Rajasthan
(c) Madhya Pradesh
(d) Maharashtra
Show Answer & Explanation

Answer: (a) Gujarat

Explanation:
1. It is home to the Asiatic lion.

Question 3: Valmiki National Park is in
(a) Bihar
(b) Uttar Pradesh
(c) Assam
(d) Odisha
Show Answer & Explanation

Answer: (a) Bihar

Explanation:
1. It is a tiger reserve.

Question 4: In a sanctuary, protection is given to
(a) Fauna
(b) Flora only
(c) Both fully
(d) Humans only
Show Answer & Explanation

Answer: (a) Fauna

Explanation:
1. Some human activities are allowed.

Question 5: The chemical formula of nitrous oxide is
(a) N2O
(b) NO2
(c) NO
(d) N2O5
Show Answer & Explanation

Answer: (a) N2O

Explanation:
1. Nitrous oxide is a potent greenhouse gas.

Question 6: The UNFCCC entered into force on
(a) 21 March 1994
(b) 5 June 1972
(c) 16 September 1987
(d) 11 December 1997
Show Answer & Explanation

Answer: (a) 21 March 1994

Explanation:
1. The UN Framework Convention on Climate Change took effect in 1994.

Question 7: The atmospheric gas that is mainly responsible for Green House effect :
(a) Ozone
(b) Nitrogen
(c) Oxygen
(d) Carbondioxide
Show Answer & Explanation

Answer: (d) Carbondioxide

Explanation:
1. Carbon dioxide is the main gas responsible for the greenhouse effect.

Question 8: An important green-house gas other than methane being produced from the agricultural fields is
(a) Nitrous oxide
(b) Ammonia
(c) Sulphur dioxide
(d) Arsine
Show Answer & Explanation

Answer: (a) Nitrous oxide

Explanation:
1. Nitrous oxide is a greenhouse gas released from agricultural fields.

Question 9: The United Nations Framework Convention on Climate Change (UNFCCC) was adopted in
(a) 1992
(b) 1972
(c) 1987
(d) 2015
Show Answer & Explanation

Answer: (a) 1992

Explanation:
1. It was opened for signature at the Rio Earth Summit.

Question 10: The greenhouse effect is a natural phenomenon that keeps the Earth
(a) Warm
(b) Cold
(c) Dry
(d) Wet
Show Answer & Explanation

Answer: (a) Warm

Explanation:
1. Excess greenhouse gases cause global warming.

Question 11: Methane is released from
(a) Rice paddies and waste dumps
(b) Volcanoes only
(c) Oceans only
(d) Forests only
Show Answer & Explanation

Answer: (a) Rice paddies and waste dumps

Explanation:
1. It is a greenhouse gas.

Question 12: The chemical formula of CFC-12 is
(a) CCl2F2
(b) CClF3
(c) CH4
(d) CO2
Show Answer & Explanation

Answer: (a) CCl2F2

Explanation:
1. It is used in refrigerants.

Question 13: Earth Hour is organised by
(a) UNESCO
(b) Earth Hour Foundation
(c) World Wildlife Fund
(d) UN Environment Programme
Show Answer & Explanation

Answer: (c) World Wildlife Fund

Explanation:
1. Earth Hour, when people switch off lights for an hour, is organised by the World Wide Fund for Nature (WWF).

Question 14: Which one of the following is not biodegradable?
(a) Woollen mat
(b) Silver foil
(c) Leather bag
(d) Jute basket
Show Answer & Explanation

Answer: (b) Silver foil

Explanation:
1. Silver foil is metallic and not broken down by microbes; wool, leather and jute are biodegradable.

Question 15: Which one among the following group of items contain only biodegradable items?
(a) Wood, Grass, Plastic
(b) Wood, Grass, Leather
(c) Fruit peels, Lime juice, China clay cup
(d) Lime juice, Grass, Polystyrene cup
Show Answer & Explanation

Answer: (b) Wood, Grass, Leather

Explanation:
1. Wood, grass and leather are all organic and biodegradable; plastic, polystyrene and china clay are not.

Question 16: The international convention on wetlands is the
(a) Ramsar Convention
(b) Montreal Protocol
(c) Kyoto Protocol
(d) Basel Convention
Show Answer & Explanation

Answer: (a) Ramsar Convention

Explanation:
1. It was signed in 1971.

Question 17: Wetlands occupy about what percentage of the Earth's surface?
(a) 2 per cent
(b) 10 per cent
(c) 25 per cent
(d) 50 per cent
Show Answer & Explanation

Answer: (a) 2 per cent

Explanation:
1. They store about 10-14 per cent of carbon.

Question 18: The key factor determining productivity of a wetland is its
(a) Hydroperiod
(b) Altitude
(c) Latitude
(d) Soil colour
Show Answer & Explanation

Answer: (a) Hydroperiod

Explanation:
1. It is the periodic fluctuation of water level.

Question 19: The Earth Summit of 1992 was held at
(a) Rio de Janeiro
(b) Stockholm
(c) Kyoto
(d) Paris
Show Answer & Explanation

Answer: (a) Rio de Janeiro

Explanation:
1. It is officially the UNCED.

Question 20: UNCED stands for the United Nations Conference on
(a) Environment and Development
(b) Education and Development
(c) Economy and Development
(d) Energy and Development
Show Answer & Explanation

Answer: (a) Environment and Development

Explanation:
1. It was held in 1992 at Rio.

Question 21: REDD aims to reduce emissions from
(a) Deforestation and forest degradation
(b) Vehicles
(c) Industries
(d) Agriculture
Show Answer & Explanation

Answer: (a) Deforestation and forest degradation

Explanation:
1. It was launched in 2005.

Question 22: Which one among the following is a non-conventional source of energy?
(a) Petroleum
(b) Coal
(c) Radioactive elements
(d) Solar energy
Show Answer & Explanation

Answer: (d) Solar energy

Explanation:
1. Solar energy is renewable and non-conventional; petroleum, coal and radioactive fuels are conventional sources.

Question 23: Which one of the following is not a constituent of biogas?
(a) Methane
(b) Carbon dioxide
(c) Hydrogen
(d) Nitrogen dioxide
Show Answer & Explanation

Answer: (d) Nitrogen dioxide

Explanation:
1. Biogas is mainly methane and carbon dioxide with traces of hydrogen and hydrogen sulphide; it has no nitrogen dioxide.

Question 24: Where is the Centre for Wind Energy Technology (C-WET) located?
(a) Hyderabad
(b) Chennai
(c) Kochi
(d) Kolkata
Show Answer & Explanation

Answer: (b) Chennai

Explanation:
1. The correct answer is Chennai.

Question 25: Wind Energy is produced in
(a) Kayathar
(b) Tirunelveli
(c) Kodaikanal
(d) Pollachi
Show Answer & Explanation

Answer: (a) Kayathar

Explanation:
1. In Kayathar, Tamil Nadu, wind energy is produced in much quantity.

Question 26: The energy that can harness heat stored below the earth‘s surface is known as ;
(a) thermal energy
(b) nuclear energy
(c) tidal energy
(d) geo-thermal energy
Show Answer & Explanation

Answer: (d) geo-thermal energy

Explanation:
1. Geothermal energy harnesses heat stored below the earth's surface.

Question 27: Ozone hole refers to
(a) a hole in the ozone layer
(b) a decrease in thickness of ozone in the troposphere
(c) a decrease in thickness of the ozone layer in the stratosphere
(d) an increase in thickness of the ozone layer
Show Answer & Explanation

Answer: (c) a decrease in thickness of the ozone layer in the stratosphere

Explanation:
1. The "hole" is a seasonal thinning of stratospheric ozone over Antarctica.

Question 28: India acceded to the Vienna Convention for protection of the ozone layer in
(a) 1985 (signed March 1985)
(b) 1987
(c) 1992
(d) 1972
Show Answer & Explanation

Answer: (a) 1985 (signed March 1985)

Explanation:
1. The Vienna Convention was adopted in 1985.

Question 29: Ozone saves the biosphere by absorbing high energy radiations called
(a) Infra-red (IR)
(b) Gamma rays
(c) Ultraviolet rays (UV)
(d) X-rays
Show Answer & Explanation

Answer: (c) Ultraviolet rays (UV)

Explanation:
1. The ozone layer protects the biosphere by absorbing ultraviolet rays.

Question 30: Which type of radiations are absorbed by the upper layer of the atmosphere?
(a) Radio-waves
(b) Infrared
(c) Visible
(d) Ultraviolet
Show Answer & Explanation

Answer: (d) Ultraviolet

Explanation:
1. The upper layer of the atmosphere absorbs ultraviolet radiation.

Question 31: ‘Aerosol’ is
(a) Suspended solid particles in air
(b) Pollutant gas, present in air
(c) Microbes, present in air
(d) Green house gas present in air
Show Answer & Explanation

Answer: (a) Suspended solid particles in air

Explanation:
1. An aerosol is a suspension of solid particles in air.

Question 32: Cadmium pollution damages the
(a) Lungs, kidneys and bones
(b) Teeth
(c) Brain
(d) Thyroid
Show Answer & Explanation

Answer: (a) Lungs, kidneys and bones

Explanation:
1. It comes from smelters.

Question 33: Bandipur National Park is in
(a) Karnataka
(b) Kerala
(c) Tamil Nadu
(d) Andhra Pradesh
Show Answer & Explanation

Answer: (a) Karnataka

Explanation:
1. Bandipur is in Karnataka.

Question 34: The Silent Valley National Park is in
(a) Kerala
(b) Karnataka
(c) Tamil Nadu
(d) Goa
Show Answer & Explanation

Answer: (a) Kerala

Explanation:
1. Silent Valley is in Palakkad district, Kerala.

Question 35: Periyar National Park is in
(a) Kerala
(b) Karnataka
(c) Tamil Nadu
(d) Andhra Pradesh
Show Answer & Explanation

Answer: (a) Kerala

Explanation:
1. Periyar is in Idukki, Kerala.

Question 36: Kanha National Park is in
(a) Madhya Pradesh
(b) Odisha
(c) Maharashtra
(d) Chhattisgarh
Show Answer & Explanation

Answer: (a) Madhya Pradesh

Explanation:
1. Kanha is a tiger reserve in Madhya Pradesh.

Question 37: Sultanpur Bird Sanctuary is in
(a) Haryana
(b) Rajasthan
(c) Gujarat
(d) Punjab
Show Answer & Explanation

Answer: (a) Haryana

Explanation:
1. Sultanpur is near Gurugram, Haryana.

Question 38: Bharatpur Bird Sanctuary (Keoladeo) is in
(a) Rajasthan
(b) Haryana
(c) Gujarat
(d) Punjab
Show Answer & Explanation

Answer: (a) Rajasthan

Explanation:
1. Keoladeo National Park is in Bharatpur, Rajasthan.

Question 39: Chilka Wildlife Sanctuary is in
(a) Odisha
(b) Andhra Pradesh
(c) West Bengal
(d) Tamil Nadu
Show Answer & Explanation

Answer: (a) Odisha

Explanation:
1. Chilika Lake is in Odisha.

Question 40: The Nokrek Biosphere Reserve in Meghalaya is famous for the
(a) Red panda
(b) Dugong
(c) Snow leopard
(d) Tiger
Show Answer & Explanation

Answer: (a) Red panda

Explanation:
1. It also has a citrus gene sanctuary.

Question 41: The Manas Biosphere Reserve is in
(a) Assam
(b) Meghalaya
(c) Odisha
(d) Sikkim
Show Answer & Explanation

Answer: (a) Assam

Explanation:
1. It is home to the golden langur.

Question 42: The main advantage of Rain Water Harvesting (RWH) is
(a) Avoid soil erosion
(b) Recharge ground water
(c) Avoid floods
(d) Reduce the loss of water
Show Answer & Explanation

Answer: (b) Recharge ground water

Explanation:
1. The main advantage of rainwater harvesting is recharging groundwater.

Question 43: The main advantage of rain water harvesting is
(a) avoiding soil erosion
(b) recharging ground water
(c) avoiding floods
(d) reducing loss of water
Show Answer & Explanation

Answer: (b) recharging ground water

Explanation:
1. RWH stores rain and recharges the water table.

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