Question

1. Fill in the blanks:
Petroleum is a complex mixture of hydrocarbons, mainly
and
ace.
b. Two physical factors needed for the formation of coal are
and
c. The
d.
variety of coal has the highest carbon content.
is the poisonous gas produced when coal burns in a closed room.
is a fuel found between the layers of impervious rocks.
e.
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Answer 1

Answer:

petrolim is csrbon

coala is carbon sors