14.
Statement I Petroleum is a mixture of many different hydrocarbons of different densities.
Statement II The grade of petroleum, depends mainly on the relative proportion of the different hydrocarbons.

20.
Match List-I with List-II and select the correct answer:
List-I List-II
a. Chloropicrin 1. Poisonous gas
b. Methane 2. Marsh gas
c. Acrolin 3. Tear gas
d. LSD 4. Dreamy drug

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