The material used in the manufacture of lead pencil is
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Water can be separated from alcohol water mixture by
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In addition to hydrogen, the other abundant element present on Sun’s surface is
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The most abundant element by number in the living system is :
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What is the element required for solar energy conversion ?
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Major portion of the earth’s crust is mainly constituted by
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In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins?
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Name two elements that find wide application in transistor industry.
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Which one is the naturally occuring heaviest element?
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Which of the following will replace hydrogen from acids to form salts ?
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Which of the following could be used as fuel in propellant or rockets ?
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Which gas is used for converting vegetable oils into saturated fats ?
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Which of the following gases will effuse out of football bladder most quickly ?
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The property of hydrogen which distinguishes it from alkali metals is
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Hydrogen is not found in atmosphere because
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Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
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When Hydrogen starts burning in air, it produces ?
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The gas which turns into liquid at the lowest temperature among the following is
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The gas that is used in the manufacture of vanaspati ghee is :
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Which one of the following metals does not react with water to produce Hydrogen ?
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