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Chemistry

Chemistry
Which of the following is the best fuel in terms of energy released per gram of fuel?

Hydrogen
Butane
Ethanol
Methane

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

Vinyl Chloride
Isoprene
Acetylene
Neoprene

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Chemistry
Milk is a colloidal system in which:

Water is dispersed in fat
Fat is dissolved
Fat is dispersed in water
Fat and water are dispersed in each other

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Chemistry
Formation of ozone hole is maximum over

Europe
Africa
Antarctica
India

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Chemistry
The value of gas constant R in Ergs deg–1 mole–1 is

8.314 × 107
8.341 × 107
8.413 × 107
4.183 × 107

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Chemistry
What is the atomic number of mercury

41
63
80
32

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