Chemistry help, 10 points?

Catalytic "cracking' is a process used to manufacture __gasoline__.
Reason: catalytic cracking is the process to crack large hydrocarbon molecules to small hydrocarbon molecules. Gasoline consists of small hydrocarbon molecules.

Natural gas is chiefly __methane__.
Reason: Natural gas consists of small hydrocarbons, in which methane is the major component.

Water gas consists principally of a mixture of hydrogen and __carbon monoxide__.
Reason: Water gas is made of the catalytic reaction between steam and red hot carbon (coke) to give hydrogen and carbon dioxide gases.
C(s) + H₂O(g) → CO(g) + H₂(g)

The reagents for the preparation of water gas may be __coke and carbon__.
Reason: Refer to the answer of after question. Coke consists of mainly carbon.

Using high temperature and pressures to split petroleum molecules is called __cracking__.
Reason: This is the definition of cracking.

The chief impurity in producer gas is __N₂__.
Reason: In the process of making producer gas, air is passed over red hot coke (or other carbonaceous material), and the oxygen in air reacts with carbon to give carbon monoxide gas as a fuel. The nitrogen gas (N₂) is left unreacted and exists as an impurities.

A pipeline originating in Texas furnishes some sections of New York state with __natural gas__.
Reason: It is the fact.

Water gas may be produced by the action of steam on hot __carbon__.
Reason: As mentioned before.

The process of increasing the amount of gasoline obtained from petroleum is called __cracking__.
Reason: As mentioned before, hydrocarbons undergo cracking to give gasoline.

The principal solid fuels used in industry are __wool and coal__.
Reason: Common solid fuels including wood, coal and charcoal. Coke is seldom used as solid fuel, and it is commonly used extraction of metals such as iron.

There is nothing in these questions that you couldn't have got for yourself with a Google search and in the process you would have learned something (which was probably the intended purpose of the question).

gasoline

methane

carbon monoxide

coke and steam

cracking

CO2

[none of the above, mostly gasoline] https://en.wikipedia.org/wiki/Colonial_Pipeline
(In order to answer this question correctly, you need to read what you were supposed to read before answering these questions.)

carbon

catalysis

coal and coke