_______ are used as rocket propellants in olden days.(a) solid fuels(b) liquid fuels(c) petroleum(d) gaseous fuelsThe question was asked in an international level competition.My question comes from Solid Fuels topic in chapter Fuel Technologies of Applied Chemistry

_______ are used as rocket propellants in olden days.(a) solid fuels(b

1.	_______ are used as rocket propellants in olden days.(a) solid fuels(b) liquid fuels(c) petroleum(d) gaseous fuelsThe question was asked in an international level competition.My question comes from Solid Fuels topic in chapter Fuel Technologies of Applied Chemistry
Answer» Correct CHOICE is (a) solid fuels For EXPLANATION I would say: Solid fuels are used in rocket fuels. Gun powder is the MAIN solid fuels that is mostly used in the ROCKETS in the EARLY stages but now we are using mostly liquid fuels as they have more efficiency than solid fuels.

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