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Chemistry

Chemistry
Which gas emitted by power stations causes acid rain?

Carbon dioxide
Sulphur dioxide
Helium
Nitrogen

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Chemistry
The basic chemical building block of natural rubber obtained from trees is

Vinyl Chloride
Acetylene
Isoprene
Neoprene

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Chemistry
The percentage of carbon in cost iron is :

0.01 to 0.25
3 to 5
6 to 8
0.5 to 1.5

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Chemistry
The items amenable to detection by soft x-rays are

narcotics
lead in bullets
genuine coins from counterfeit coins
contrabands

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Chemistry
Cinnabar is an ore/mineral of

Lead
Molybdenum
Manganese
Mercury

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is costlier than tin
Zinc is less reactive than tin
Zinc has a higher melting point than tin
Zinc is more reactive than tin

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