(a(i))[1]
State the name of the change of state from gas to liquid.
(a(ii))[4]
Use the kinetic particle theory to describe the differences between nitrogen gas and liquid nitrogen in terms of: • how far apart the particles are • how the particles move.
(b(i))[1]
State one origin of oxides of nitrogen in the air.
(b(ii))[1]
Give one harmful effect of acid rain on buildings.
(c(i))[3]
Put the sample in a test-tube, then add aqueous sodium ................. . Then add ................. . Warm gently. A gas is produced. The name of this gas is ................. .
(c(ii))[3]
Complete the word equation for this reaction. nitric acid + calcium carbonate $\rightarrow$ ............... + ............... + ...............