Q2 of 23 Page 157

A compound has molecular formula C2H6O. It is usable as fuel. Identify the compound.

The compound is ethanol (C2H5OH). Ethanol is used as a fuel in certain places as it is cleaner, and would give rise to only carbon dioxide and water on burning in the sufficient amount of air.


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1

Write the molecular formula of an alkene and alkane with twenty carbon atoms.

 3

The molecular formulae of two members of a homologous series are C3H4 and C6H10. Write the molecular formula of the member with five carbon atoms in a molecule.

 4

Which of the following are carboxylic acids:

C2H4O2, C2H4O, C2H6O, C3H6O2?

 5

A vegetable oil contains two double bonds in its molecule. How many moles of hydrogen gas are required for complete hydrogenation of 1 mole of oil?