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Chemistry

Chemistry
Bleaching powder is used in drinking water as a/an

Coagulant
Antibiotic
Disinfectant
Antiseptic

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Chemistry
Helium gas is filled in ballons because

It is a noble gas
It is one of the constitutents of water
It is lighter than air
Its atomic number is 2

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Chemistry
Which of the following has least negative electron gain enthalpy

Cl
S
P
F

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Chemistry
The manufacturing of iron from iron ore involves the process of

Fractional distillation
Reduction
Electrolysis
Oxidation

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Chemistry
Which one element from below list is liquid at room temperature

Lead
Argon
Bromine
Zinc

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Chemistry
Gunpowder consits of a mixture of

Nitre, sulphur and charcoal
TNT and charcoal
Sand and TNT
Sulphur, sand and charcoal

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