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Chemistry

Chemistry
The lightest gas which is non-inflammable is

Helium
Nitrogen
Oxygen
Hydrogen

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Chemistry
Of the following commonly used materials, the one that is not an alloy is

Brass
Bronze
Steel
Copper

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Chemistry
Which of the following acids serves as an electrolyte in a lead storage battery?

Lactic acid
Sulphuric acid
Hydrochloric acid
Nitric acid

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Chemistry
The high reactivity of fluorine is due to

availability of d-orbitals
small size of fluorine atom
strong F - F bond
its high electro negativity

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Chemistry
The residue left after extracting juice from sugarbeet and sugarcane is called

Biomass
Whey
Molasses
Bagasse

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Chemistry
Cement is made hard with

Dissociation of water
Dehydration
Hydration and dissociation of water
Polymerisation

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