Question

The two ways of collecting information on the basis of questionnaire are *
1 point
a) Mailing method and numerators method
b) Mail method and correspondent method
c) Mail method and informants method
d) Mailing method and enumerators method
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Answer 1

Petrochemicals are derived from various chemical compounds, mainly from hydrocarbons. These hydrocarbons are derived from crude oil and natural gas. Among the various fractions produced by distillation of crude oil, petroleum gases, naphtha, kerosene and gas oil are the main feed stocks for petrochemical industry.

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Answer 2

Answer:

(d) Mailing method and enumerators method