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Chemistry

Chemistry
The length of double bond is _______ than single bond

None of these
Shorter
Longer
Of same lenght

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Chemistry
For generation of biogas, the materials commonly used are

Aquatic plants
Animal wastes
Forest residues
Crop residues

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Chemistry
A balloon filled with helium rises in air because

Air exerts an upward force on the balloon
The balloon is weightless
Helium is less dense than air
Helium pushes down on the air below the balloon

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Chemistry
Zinc sulphide is commonly used as

Herbicide
Rodenticide
Deodorant
Fungicide

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Chemistry
Inert gases are

Not stable
Chemically very active
Chemically unreactive
Miscible with water

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Chemistry
The compound to which H2 does not add is

Tetra –9 – phenanthrylethylene
Biphenyl ethylene
Tetraphenyl ethylene
Tetra – a –naphthylethylene

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