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Chemistry

Chemistry
What is the mass percentage of oxygen in carbon dioxide (CO2)

0.305
0.658
0.727
0.509

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Chemistry
Plastic is a type of

Polyester
None of these
Polymer
Acrylic

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Chemistry
Which among the following is a carbohydrate ?

Nylon
Cane-sugar
Turpentine
Hydrogen peroxide

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Chemistry
The aprotic solvent is

NH3
H2O
HF
C6H6

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Chemistry
Which one of the following is used as preservative for foodstuff ?

Sodium Benzoate
Sodium Chloride
Glycerine
Picric acid

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Chemistry
Ozone saves the biosphere by absorbing high energy radiations called ________ .

Ultraviolet rays (UV)
Infra-red (IR)
X–rays
Gamma rays

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