01.
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The element which has biggest atom ? Ans : Francium |
02.
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The elements which have the same atomic number and different mass number is called ? Ans : Isotopes |
03.
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The first artificial fiber ? Ans : Rayon |
04.
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The gas caused to Bhopal Tragedy ? Ans : Methyl Isocynate |
05.
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The highly reactive element is ? Ans : Fluorine |
06.
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The main constituent of dynamite ? Ans : TNT |
07.
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The most costly metal ? Ans : Radium |
08.
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The most stable element ? Ans : Lead |
09.
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The purest form of water is ? Ans : Rain water |
10.
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The solution in which gold dissolves is ? Ans : Aquaregia |
11.
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The substance used for dry cleaning ? Ans : Petrol |
12.
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The sugar found in milk ? Ans : Lactose |
13.
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When iron rusts the weight of it is ? Ans : Increases |
14.
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Which element is most abundant in Human body ? Ans : Oxygen |
15.
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Which element is mostly present in protein ? Ans : Nitrogen |
16.
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Which element’s crystal is used in Transistor ? Ans : Germanium |
17.
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Which gas filled in an electric bulb ? Ans : Argon |
18.
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Which is called “Flour of Zinc” ? Ans : Zinc Oxide |
19.
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Which is called “Grain Alcohol” ? Ans : Ethanol |
20.
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Which is called “Tear Gas” ? Ans : Benzene Chloride |
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