MCQs: A reaction in which oxygen is used up for the production of thermal and light energy is known as
Category: Science Mcqs, Published by: teswesm
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MCQs: Air present in 100cm3 of water is about
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MCQs: The breathing system of plants is present in
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MCQs: The fractional distillation is a process in which liquids evaporate at
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MCQs: Photosynthesis occurs during the
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MCQs: Oxygen gas is
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MCQs: An odorless, invisible gas that makes about 20%-22% of the earth's atmosphere is known as
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MCQs: A thin layer that is held in place by gravity and provides us with oxygen is known as
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MCQs: The percentage composition of nitrogen in air is
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MCQs: The second step of fractional distillation is heating the mixture so that components evaporate at their
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MCQs: In respiration, living organisms take in oxygen and give out
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MCQs: The left over gas after the process of combustion is generally
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MCQs: The sphere that prevent the ultraviolet rays from sun is known as
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MCQs: In humid areas, the water vapor content is
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MCQs: The percentage composition of oxygen in air is
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MCQs: Air is important on earth because it has necessary components essential for the life of
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MCQs: In respiration glucose and oxygen combine together to form
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MCQs: The process of trapping some of the heat from the sun to maintain the life on earth is known as
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MCQs: People having respiratory problems like asthma, are dosed medically with
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MCQs: Oxygen is used in the manufacture of
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