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Chemistry

Chemistry
The maximum number of isomers for an alkene with molecular formula C4H8 is

4
3
2
5

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Chemistry
Which one element from below list is liquid at room temperature

Lead
Argon
Zinc
Bromine

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Chemistry
One carat of diamond is equal to

150 mg
100 mg
250 mg
200 mg

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Chemistry
For generation of biogas, the materials commonly used are

Forest residues
Crop residues
Aquatic plants
Animal wastes

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Chemistry
Cyanide poisoning causes death in seconds because

It breaks the electron transport chain
It causes Lysis of red blood cells
It causes cardiac arrest
It denatures enzymes of the heart/muscle

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Chemistry
An inert gas mixed with oxygen given to patients suffering from restricted breathing is

Helium
Krypton
Radon
Argon

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