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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
The new strain of bacteria produced by biotechnology in alcohol industry is

Escherichia coli
Bacillus subtilis
Saccharomyces cerevisiae
Pseudomonas putida

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Chemistry
Peroxyacetyl nitrate is a

Acidic dye
Secondary pollutant
Vitamin
Plant hormone

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Chemistry
Ruby and sapphire are oxides of

Tin
Copper
Aluminium
Iron

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Chemistry
The method that cannot be used for removing permanent hardness of water is

distillation
adding caustic soda
boiling
adding sodium carbonate

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Chemistry
Alum stops bleeding in minor cuts because of

Solvation
Coagulation
Dialysis
Emulsion

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