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Question Bank: Science

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

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