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Chemistry

Chemistry
The metal ion present in Vitamin B12 is

Zinc
Cobalt
Iron
Nickel

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Chemistry
At room temperature, the metal that remains liquid is:

Platinum
Mercury
Zinc
Lead

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Chemistry
Which of the following is biodegradable ?

Paper
D.T.
Plastic
Aluminium

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Chemistry
Nucleons are regarded as composites sub-particles known as

Leptons
Photons
Mesons
Quarks

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Chemistry
Which halide is used in making sensitive emulsion on photograhic film?

Sodium chloride
Silver chloride
Silver iodide
Silver bromide

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Chemistry
Catalyst is a substance which

Decreases the rate of reaction
None of these
Has no action on the rate of the reaction
Increases the rate of the reaction

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