Assertion and Reason Questions for Class 9 Science Chapter 14 Natural Resources
Here we are providing assertion reason questions for class 9 science. This article covers assertion reason questions based on Class 9 Science Chapter 14 Natural Resources. To check the answer, click on ‘answer’ given below each question. After clicking it will expand.
Directions: In each of the following questions, a statement of Assertion is given, and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true, but reason is false.
(d) Assertion is false, but reason is true.
Q.1.
Assertion : Acid rain is the rainwater containing dissolved acids.
Reason : Oxides of Sulphur and Nitrogen dissolves in rainwater and give rise to acid rain.
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Answer: aQ.2.
Assertion: Smog is formed from smoke and fog.
Reason: Smog is an opaque fog.
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Answer: bQ.3.
Assertion : If ozone layer is depleted it will be harmful for humans.
Reason : Too much exposure to UV rays causes skin cancer.
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Answer: aQ.4.
Assertion : Ozone is a pollutant.
Reason : Ozone reduces air visibility and causes various health problems.
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Answer: aQ.5.
Assertion: There is an adverse effect of pollutants on Taj Mahal.
Reason: Discolouration of Taj Mahal is due to nitrogen oxides.
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Answer: cQ.6.
Assertion : Carbon monoxide (CO) is a toxic air pollutant.
Reason : Automobiles, cigarettes etc. release carbon monoxide in the form of smoke.
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Answer: bQ.7.
Assertion: People love to fly kites near the sea shore.
Reason: Wind/breeze flows from sea to land in day time.
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Answer: aQ.8.
Assertion : Elemental oxygen is normally found only in the form of a diatomic molecule.
Reason : A single oxygen atom is unstable.
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Answer: dQ.9.
Assertion : A change in temperature adversely affect aquatic organisms.
Reason : They are used to a certain range of temperature in the water-body where they live.
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Answer: aQ.10.
Assertion : Ozone layer works as a shield for earth.
Reason : Ozone layer reduces the amount of ultraviolet rays reaching the earth.
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Answer: aQ.11.
Assertion : Producers (plants), consumers (animals) and decomposers (bacteria, fungi) all are biotic component of an ecosystem.
Reason : Biotic component of an ecosystem are the living part.
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Answer: aQ.12.
Assertion : Environment is also called as biosphere.
Reason : Biosphere includes – lithosphere, hydrosphere and atmosphere.
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Answer: bQ.13.
Assertion : Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings.
Reason : The burning of fossil fuels like coal, natural gas, petroleum in automobiles, industries and thermal plants leads to increase in air pollution.
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Answer: bQ.14.
Assertion : Greenhouse effect is the rise in temperature that the earth experiences because of certain gases in the atmosphere.
Reason : Water vapour, CO2, NO, methane etc. trap energy from the sun.
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Answer: aQ.15.
Assertion : In large parts of India, rains are mostly brought by the South-West or North-East monsoons.
Reason : Rainfall patterns are decided by the prevailing wind patterns.
