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Chemistry

Chemistry
Which of the following is the petroleum wax ?

Carnauba wax
Paraffin wax
Bees wax
Jojoba wax

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Chemistry
Diamond is lustrous because

Its refractive index is high
It is colourless
It is hard
It is pure

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Chemistry
The metal that is used as a catalyst in the hydrogenation of oils is

Pb
Ni
Cu
Pt

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Chemistry
Sea weeds are important source of

Chlorine
Bromine
Iron
Iodine

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Chemistry
Supersonic jet causes pollution by thinning of

SO2 layer
CO2 layer
O3 layer
O 2 layer

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Chemistry
Which of the following is used as a lubricant in heavy machines?

Sulphur
Graphite
Bauxite
Phosphorus

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