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Question Bank: Science

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1) Paper is manufactured by
2) The hardest substance available on the earth is
3) Atomic bomb is based on the principle of
4) German silver is an alloy of
5) The most abundant metal in the earth's crust is
6) In an atomic nucleus, neutron and protons are held together by
7) What is laughing gas?
8) Which of the following is a protein?
9) In vulcanisation, natural rubber is heated with
10) Safety wire used in domestic electrical appliances is made of meta of
11) Which of the following are most penetrating?
12) The ratio of pure gold in 18 carat gold is
13) The first synthetic fibre made by man was
14) Which of the following is used as a moderator in nuclear reactor?
15) Which of the following is the lightest metal?
16) Which synthetic fibre is known as artificial silk?
17) Atoms are composed of
18) The element common to all acids is
19) The filament of an electric bulb is made of
20) Deep blue colour is imparted to glass by the presence of

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