Question

Match the following:

Column A	Column B
(a) Pb(NO3)2	(i) rotten eggs smell
(b) CO2	(ii) burns with a pop sound
(c) (NH4)2Cr2O7	(iii) the suffocating smell of sulphur
(d) HCI	(iv) lime water turns milky
(e) NO2	(v) crackling sound
(f) O2	(vi) residue swells up
(g) H2	(vii) brown gas
(i) H2S	(viii) supports combustion
(j) SO2	(ix) fumes with NH3 solution

Answer 1

Column A	Column B
(a) Pb(NO3)2	(v) crackling sound
(b) CO2	(iv) lime water turns milky
(c) (NH4)2Cr2O7	(vi) residue swells up
(d) HCI	(ix) fumes with NH3 solution
(e) NO2	(vii) brown gas
(f) O2	(viii) supports combustion
(g) H2	(ii) burns with a pop sound
(i) H2S	(i) rotten eggs smell
(j) SO2	(iii) the suffocating smell of sulphur