Of the following metals which, one pollutes the air of a big
city?
1 Copper
2 Chromium
3 Lead
4 Cadmium
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Explain the Evolution of Science as a discipline in the Medieval Period
0 Answers Mahatma Gandhi University,
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Which of the following is not a compound? 1 Silica 2 Red lead 3 Slaked lime 4 Black lead
The process by which an organic compound breaks down into simpler compounds on heating to high temperature is known as 1 Armatisation 2 Polymerization 3 Pyrolysis 4 Reduction
The ore of which of the following metals can be concentrated by hydraulic washing? 1 Tin 2 Sodium 3 Iron 4 Manganese
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The gases used in different types of welding would include 1 Oxygen and hydrogen 2 Oxygen, acetylene and argon 3 Oxygen and acetylene 4 None of these
The correct sequence of various regions I absorption spectrum is 1 Visible, ultraviolet, microwave, infra red 2 Infra red, gamma rays, ultraviolet, microwave 3 Ultra violet, visible, infra red, microwave 4 None of these
Which of the following is the best conductor of electricity? 1 Zinc 2 Copper 3 Gold 4 Silver