MCQs: On cooling, a liquid will be changed into
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MCQs: Combustion cannot take place without
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MCQs: Breathing is a process that refers to the inhaling and exhaling of
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MCQs: Greenhouse gases and other harmful gases are bringing huge damage to the atmosphere like
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MCQs: The process of burning under the presence of oxygen is known as
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MCQs: In desert areas, the water vapor content is
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MCQs: To perform fractional distillation of air, it must be liquefied and then purified to remove
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MCQs: Intake of carbon dioxide and giving out of oxygen is the only process named
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MCQs: Air is a mixture that makes up the
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MCQs: The condensation point of oxygen gas is
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MCQs: Ammonia is used to make compounds such as
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MCQs: The layer that blocks the ultraviolet (UV) rays from the sun is
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MCQs: In fish, respiration takes place through
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MCQs: Air solubility of water is defined as the ability of air to be dissolved in
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MCQs: Rust is actually
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MCQs: When a gas is cooled or compressed it becomes a
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MCQs: The mixture important for human life and combustion is
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MCQs: Both gas and liquids are fluids. Fluids are substances which don't have fixed
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MCQs: The process in which energy is released by the combination of glucose and oxygen is known as
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MCQs: The most abundant element is oxygen within the
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