MCQs: If 1g of hydrogen is mixed with 8g of oxygen, the produced water will be
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MCQs: Ag' is the symbol of element
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MCQs: Solid 'carbon dioxide' crystals make
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MCQs: Gold, silver, copper and aluminum are
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MCQs: A chemical reaction can be explained and presented in the form of
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MCQs: Element which is non metal and is found on right side of periodic table is
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MCQs: The first most abundant element found in universe is
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MCQs: The number of natural elements is
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MCQs: Stars are made up of two most abundant elements in universe namely
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MCQs: In a periodic table, the row of elements is called
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MCQs: The total number of elements is
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MCQs: Sodium and chlorine react together to form
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MCQs: Fossil fuels are rich in carbon and
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MCQs: Thousands of mirrors or curved metals are used to focus solar energy to make it very hot, in
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MCQs: Wind is beneficial resource of energy as it doesn't cause
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MCQs: Hot water or steam carrying geothermal energy often comes up to surface in
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MCQs: Fossils fuel is an important source of energy for
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MCQs: When animals and plants are rotten in the absence of air, there produces a gas called
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MCQs: Black painted panels which are hanged at roofs to trap heat and energy from sun, are
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MCQs: Earth emits heat by eruptions of
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