The gas that usually causes explosions in coal mines is
1 Hydrogen
2 Carbon monoxide
3 Air
4 Methane
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Answer / surendra
its Hydrogen that combusts and cause explosion
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Rayon is chemically 1 Glucose 2 Amylase 3 Cellulose 4 Pectin
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Give two National aims of science education
0 Answers Mahatma Gandhi University,
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Which of the following is a chemical change? 1 Oxidation 2 Reduction 3 Sublimation 4 Decomposition
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