1A few years ago, many alcoholics in a small village in China had drunk
some bogus alcohols manufactured by business culprits and many blinded
and even some died. Which of the following is the most possible substance
present in the bogus alcohols?
A.Methane
B.Methanol
C.Ethanol
D.Ethanoic acid
2The following reactions can be applied to produce oxygen in laboratory:
Reaction 1: 2KClO3 2KCl + 3O2 upon heating with catalyst
Reaction 2: 2HgO 2Hg + O2 upon heating
Reaction 3: 2Na2O2 + 2H2O 4NaOH + O2 upon heating
If the same total mass(es) of reactant(s) are used, the ascending order of
mass of oxygen produced would be:
A.Reaction 1 < Reaction 3 < Reaction 2
B.Reaction 1 < Reaction 2 < Reaction 3
C.Reaction 3 < Reaction 2 < Reaction 1
D.Reaction 3 < Reaction 1 < Reaction 2
3.100 cm3 of a gas X2 react completely with 300 cm3 of hydrogen to form 200
cm3 of a gaseous hydride. If all measurements are made at room temperature,
the formula of the gaseous hydride is
A.X3H2.
B.XH4.
C.X2H3.
D.XH3.