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Chemistry

Chemistry
The strongest acid of the following is

P-nitrophenol
P-chlorophenol
O-nitrophenol
M-nitrophenol

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Chemistry
The polymerisation of which often following is used in manufacturing of polythene in industry ?

Methane
Ethylene
Acetylene
Styrene

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Chemistry
The name of unreactive gas is

Nitrogen
Hydrogen
Carbon dioxide
Oxygen

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Chemistry
________ is a by product of sewage treatment and can be decomposed to produce biogas

Sludge
Sewage
Scum
Sewer

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Chemistry
Poison used for killing rats is

Zinc phosphide (Zn3P2)
Magnesium nitride (Mg3N2)
Calcium phosphide (Ca3P2)
Magnesium phosphide (Mg3P2)

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Chemistry
The aqueous solution of potassium chloride is

A weak electrolyte
Initially weak and then become a strong electrolyte
A non-electrolyte
A strong electrolyte

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