class 10th science Carbon Compounds and Reactions Quiz

Carbon forms a large number of compounds mainly due to:

• Electrovalency

• Catenation and tetravalency

• Large atomic size

• Presence of free electrons

Which of the following is not a property of covalent compounds?

• Low melting and boiling points

• Poor conductors of electricity

• Formation of ions in solution

• Exist as liquids or gases

Which of the following shows a triple bond in its molecule?

• Ethane

• Ethene

• Ethyne

• Methane

Which allotrope of carbon is the hardest natural substance?

• Graphite

• Diamond

• Fullerene

• Coal

The general formula of alkenes is:

• CnH₂n+2

• CnH₂n

• CnH₂n–2

• CnHn

Which of the following is a structural isomer of butane?

• Pentane

• Cyclobutane

• 2-methylpropane

• Ethane

The functional group –OH represents:

• Aldehyde

• Alcohol

• Ketone

• Carboxylic acid

Which compound is used for making vinegar?

• Methanol

• Ethanol

• Ethanoic acid

• Acetone

The reaction of ethanol with concentrated H₂SO₄ at 443 K produces:

• Ethanoic acid

• Ethene

• Ethyne

• Methane

Which gas is evolved when ethanol reacts with sodium?

• Oxygen

• Carbon dioxide

• Hydrogen

• Methane