a) Write the chemical formula of calcium carbonate.

b) Which gas is produced when calcium carbonate reacts with acids?

c) What is the name of an aqueous solution of this gas?

d) Write any two substances that contain calcium carbonate.

The names of some allotropes of carbon, their properties and uses are given in the table, but not in the correct order. Match them suitably.

Some statements related to carbon monoxide and carbon dioxide are given. Classify them correctly

a) formed as a result of the incomplete combustion of carbon containing substances

b) aqueous solution shows acidic nature

c) poisonous gas

d) used in fire extinguishers

e) can be used as a fuel

f) formed as a result of the complete combustion of substances

g) can be prepared from carbonates and bicarbonates

h) is a component of producer gas and water gas.

Write the chemical formula of the compounds that are missing in the homologues series given below.

A

B

C

Given below are the chemical formulae of some hydrocarbons

C₃H₆, C₂H₆, C₃H₄

a) Represent their structure

b) Based on their structure, classify them into alkane, alkene and alkyne.