Chemistry
Baryllium Sulphate is less soluble in water due to

High inflammable energy
Lonic band
Low inflammable energy
Low Energy of dissociation

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Chemistry
Ammonial is a mixture of

Aluminium powder and ammonium nitrate
Aluminium powder and potassium nitrate
Aluminium powder and ammonium chloride
Aluminium powder and ammonium sulphate

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Chemistry
The mass number of a nucleus is

always more than the atomic weight
always less than its atomic number
a fraction
the sum of the number of protons and neutrons present in the nucleus

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