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Chemistry

Chemistry
Which one of the following metals pollutes the air of a city having large number of automobiles?

Cadmium
Copper
Chromium
Lead

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Chemistry
Bhopal gas tragedy is associated with leakage of

Methyl isocyanate
Carbon dioxide
Sulphur dioxide
Nitrogen dioxide

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Chemistry
Entropy of Universe is always

Decreasing
Constant
Increasing
Zero

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Chemistry
Air shows the property of

Both A and B
N2
None of these
O2

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Chemistry
When cathode rays strike a target of high atomic weight, they give rise to

? and ? rays
X-rays
?-rays
Positive rays

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Chemistry
Hard water and soft water can be distinguished by using

Liquid soap
Ordinary soap
Dilute acid
Detergent

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