(a)[1]
Using numbers only, State the percentage of nitrogen present in clean, dry air.
(b)[1]
Using numbers only, State the usual operating temperature of the Contact process in ^{\circ}C.
(c)[1]
Using numbers only, State how many metals there are in Period 3 of the Periodic Table.
(d)[1]
Using numbers only, State how many halogens are gases at r.t.p.
(e)[1]
Using numbers only, State the usual temperature for the fermentation of aqueous glucose in ^{\circ}C.
(f)[1]
Using numbers only, State the number of unbranched structural isomers of $\text{C}_4\text{H}_8$ that decolourise aqueous bromine.
(g)[1]
Using numbers only, State how many covalent bonds are present in one ethanol molecule.
(h)[1]
Using numbers only, State how many carbon atoms are in one molecule of propyl butanoate.