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Chemistry

Chemistry
The elements with atomic numbers 9, 17, 35, 53, 85 are all

Halogens
Light metals
Heavy metals
Noble gases

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Chemistry
The most abundant metal in the Earth’s crust is

Zinc
Iron
Aluminium
Copper

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Chemistry
Denatured spirit is ethanol mixed with

Pyridine
Kerosene
Water
Petrol

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Chemistry
The strongest acid of the following is

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

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Chemistry
The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :

Terylene
Nylon 66
Tollen's
Bakelite

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Chemistry
The buffer action of blood is due to the presence of

HCI and NaCI
[HCO3]– and H2CO3
CI– and [HCO3]–
CI– and [CO3]2–

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