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Chemistry

Chemistry
The chemical used in developing photographic films is

Hydroquinone
Hypo
Silver bromide
Sodium sulphate

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Chemistry
The presence of Cobalt in Vitamin B12 was established for the first time by

Sodium Nitroprusside test
Borax-Bead test
Hydrolysis test
Spectroscopy

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Chemistry
The mass number of an atom is equal to

the number of protons
the number of protons and electrons
the number of nucleons
the number of neutrons

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Chemistry
The formula C6H5-CO-CH3 represents

Phenyl acetate
Acetone
Acetic acid
Acetophenone

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Chemistry
In arc welding, Argon is used because of its

High flammability
High calorific value
Low reactivity with metal
Ability to lower the melting point of the metal

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Chemistry
The most commonly used chemicals in the artificial rainmaking or cloud seeding are

Silver Iodide (Ag I)
Dry Ice (Frozen CO2)
All of these
Sodium Chloride (NaCl)

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