01.
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Melting point of Mercury ? Ans : -38.827 Degree Centigrade |
02.
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Most common solid element in the earth crust ? Ans : Silicon |
03.
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Most abundant metallic element in the earth crust ? Ans : Aluminum 8.2% |
04.
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Most abundant element in the earth crust ? Ans : Oxygen 47.4% |
05.
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Most abundant in the earth atmosphere ? Ans : Nitrogen 78% |
06.
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Which is known as “Metal of the future” ? Ans : Titanium |
07.
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Which alloy that has the ability to remember its shape ? Ans : Nitinol |
08.
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How many man made elements in the world ? Ans : 20 |
09.
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The mixture of Carbone Monoxide and Hydrogen is called ? Ans : Water Gas |
10.
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The word Plastic derived from ? Ans : Plastikose (Greek) |
11.
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Light weight metal ? Ans : Lithium |
12.
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The chemical compounds that occur naturally on the earth ? Minerals |
13.
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The chemical used to make photographic film ? Ans : Silver Bromide |
14.
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The mixture of Water and Alcohol separated by ? Ans : Distillation |
15.
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The best conductor of electricity among different type of water ? Ans : Salt water |
16.
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Chemical property of a substance is determined by ? Ans : Electrons |
17.
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Most chemically active element ? Ans : Fluorine |
18.
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Electrically charged atoms are called ? Ans : Ions |
19.
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The compounds of LPG ? Ans : Methane, Butane and Propane |
20.
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Biogas contains ? Ans : Methane |
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