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Galvanized iron sheets have a coating of
1 Tin lead
2 Zinc
3 Chromium
4 Lead
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Which is/are the important raw material(s) required in cement industry? 1 Limestone 2 Gypsum & clay 3 Clay 4 Limestone & clay
Carbon tetrachloride fire extinguisher should not be used in closed rooms, because it produces a poisonous gas called 1 Carbon monoxide 2 Phosphine 3 Phosgene 4 None of these
What is the Protoplasm ?
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide
where the 3rd earthsummit held
Which of the following is the lightest gas? 1 Nitrogen 2 Hydrogen 3 Ammonia 4 Carbon dioxide
Bagasse, a by-product of sugar manufacturing industry, is used for the production of 1 Nylon 2 Glass 3 Paper 4 Alcohol
Among the various allogropes of carbon 1 Diamond is the hardest, lamp black is the softest 2 Diamond is the hardest, coke is the softest 3 Coke is the hardest, graphite is the softest 4 Diamond is the hardest, graphite is the softest
In fireworks, the green flame is produced because of 1 Mercury 2 Sodium 3 Potassium 4 Barium
The variety of coal in which the deposit contains recognizable traces of the orginal plant material is 1 Anthracite 2 Lignite 3 Peat 4 Bitumen
neel armstrong belongs to which country ?
Wood is the main raw material for the manufacture of 1 Paint 2 Paper 3 Ink 4 Gun powder
5 Answers Jharkhand Staff Selection Commission JSSC, RRB,
Biological Sciences 
