Coal & Petroleum

Coal and Petroleum Worksheet-7

1. In the oil wells, natural gas forms the top most layer, followed by oil and finally water. This is because

(a) Oil and gas are heavier than water      

(b) Oil and gas are lighter than water

(c) Oil and gas stick to each other

(d) None of these

2. Read the given statements and select the correct option.

Statement 1: Coal, petroleum and natural gas can not be prepared in the laboratory.

Statement 2: Their formation is a slow process and the required conditions cannot be created in the laboratory.

(a) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1