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Question Bank: Science

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

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