Which of the following is used in making smoke bombs?
1 Sulphur
2 phosphorus
3 Hydrogen
4 Carbon
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Rusting of iron involves 1 Oxidation 2 Reduction 3 Displacement 4 Decomposition
Who invented telescope?
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Caustic soda is 1 NaC1 2 Na2CO3 3 NaOH 4 NaHCO3
why ammonia cylinder getting icing outside of cylinder when it approx half or less than it...??
The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calcium 3 Calcium, ,magnesium and iron 4 None of these
Define science
0 Answers Mahatma Gandhi University,
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Which scientist made detailed study on novae?
Biological Sciences 
