User Forum

The given figure shows the petroleum deposit inside the earth’s crust.

Which of the following is correct with respect to substance X?
I. X is chiefly made up of methane.
II. X is stored under low pressure.
III. X is a clean, non-polluting fuel.

A I and III
B II and III
C I and II
D None of these

In fractionating column, various fractions are obtained at various heights of the column. As the vapours reach at a height where temperature is equal to or just below the boiling point of that fraction, it will

A Condense to form a liquid
B Remain in gaseous state
C Condense to form a solid
D Escape from the column.

Which of the following statements are correct?
(I) Coal, petroleum and natural gas are called fossil fuels.
(II) Coal and natural gas are exhaustible substances.
(III) CNG is more polluting than petrol.
(IV) Coke is used in the manufacture of steel.

A I and II only
B II and IV only
C I, III and IV only
D I, II and IV only

Different components of petroleum are separated by fractional distillation. What is the correct sequence of fractions obtained in the fractionating column from top to bottom?

A Petroleum gas, lubricating oil, kerosene, gasoline.
B Kerosene, petroleum gas, lubricating oil, gasoline.
C Petroleum gas, gasoline, kerosene, lubricating oil.
D Gasoline, kerosene, petroleum gas, lubricating oil.

Coal tar can be used as a starting material for manufacturing
(i) Drugs
(ii) Photographic materials
(iii) Cookwares
(iv) Explosives

A Only (i)
B (ii) and (iv)
C (i), (ii) and (iv)
D (ii), (iii) and (iv)

Observe the figure of destructive distillation of coal. What are the three fractions X, Y and Z?

Which of the following represents an incorrect match?

A Coal gas – Methane + Hydrogen
B LPG – Propane + Butane
C Producer gas – Carbon + Nitrogen
D CNG – Compressed methane

Study the given flowchart carefully.

Which of the following statements is correct?

A X can be condensed back to coal.
B Y and Z are useless products.
C Z starts burning when exposed to air.
D None of these

Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Refrigerators have an insulating wool of plastics.
II. Electric wires have a plastic coating.
III. Chemicals are stored in plastic containers.
IV. Parachutes are made from plastics.

A II, III and IV only
B III and IV only
C I only
D II only

One word answers are given for a few statements. Mark the answer which is not correct.

A Resources which will either never run out or are replaced within a reasonable period of time - Renewable resources.
B Wise and careful use of resources by not wasting them - Conservation.
C Conversion of wood into coal over million of years due to high temperature and pressure under the earth - Carbonisation.
D A black, viscous liquid extracted from the rocks which is a source of hydrocarbons - Coal tar.