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Coal and Petroleum Science - Coal and Petroleum

Rajasthan Board (RBSE) - STD 8 - Science (Rajasthan - English Medium). 74 questions in this chapter.

Question types

Coal and Petroleum question types

74 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

74
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7
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5
Question types
Sample Questions

Coal and Petroleum questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 26questions in details [4 marks ]4 Marks
The fossil fuel $P$ is formed under the earth by the decomposition of vegetable matter lying under water by the action of anaerobic bacteria. The major component of fuel $P$ is $Q$. The fossil fuel $P$ is used as a source of gas $R$ needed to manufacture nitrogenous fertilisers. When $P$ is filled in metal cylinders and used as a fuel in motor vehicles, it is called $S$. What are $P, Q, R$ and $S$?
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Q 27questions in details [4 marks ]4 Marks
The substance $W$ is a fossil fuel. It occurs deep below the ground in certain areas of the earth. Another fossil fuel $X$ is found trapped above the deposits of $W$. When $W$ is subjected to a process called $Y$, then a number of different products are collected at different temperature ranges which are put to different uses. A special grade of product $Z$ obtained in this way is used as aviation fuel in jet aeroplanes.
$a.$ What are $(i) W$, and $(ii) X$ ?
$b.$ What is the physical state of $(i) W,$ and $(ii) X$ ?
$c.$ Name the process $Y$.
$d.$ Name the product $Z$.
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Q 30questions in details [4 marks ]4 Marks
The material $A$ is a fossil fuel which is extracted from the earth. It is said to be formed from the buried, large land plants by a very slow process $B$. When $A$ is heated in the absence of air in a process called $C$, then it gives three products $D, E$ and $F$. The product $D$ is used as a reducing agent in the extraction of metals, the product $E$ is used as an industrial fuel whereas the product $F$ has been traditionally used for metalling the roads.
$a.$ What could material $A$ be?
$b.$ What is $(i)$ physical state, and $(ii)$ colour, of $A$?
$c.$ Name the processes $(i) B,$ and $(ii) C$.
$d.$ What are $(i) D,$ $(ii) E,$ and $(iii) F$?
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