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Question Bank: Science

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

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