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Catalytic hydrogenation of benzene produces
During the vulcanization of rubber, sulphur is added to
The main impurity in iron ore during the extraction of iron is
The general formula for the alkanals is
Fermentation is the
NH\(_3\)\(_{(g)}\) + HCl\(_{(g)}\) → NH\(_4\)Cl\(_{(s)}\)
The entropy change in the system above is
In which of the following reactions has the oxidation number of nitrogen increased?
As the concentration of an electrolyte reduces, the conductivity
When ΔH is negative, a reaction is said to be
3Cu(s) + 8HNO\(_3\)(aq) → 3Cu(NO\(_3\))\(_2\)(aq) + 4H\(_2\)O(l) + 2NO(g)
In the equation above, copper is
2SO\(_2\)(g) + O\(_2\)(g) ↔ 2SO\(_3\)(g)
ΔH = -189 kJ mol-1
The equilibrium constant for the reaction above is increased by?
C(s) + 2S(g) → CS\(_2\)(g)
ΔH = +89 kJ mol-1
The chemical equation above implies that
Ethanoic acid is
What current in amperes will deposit 2.7g of aluminium in 2 hours?
[Al = 27, F = 96 500 C mol-1]
Which of the following best explains the increase in the rate of a chemical reaction as the temperature rises?
A metal M displaces zinc from zinc chloride solution. This shows that
P(g) + Q(g) ↔ 3R(s) + S(g) ΔH is negative
Which of the following will increase the yield of R?
In which of the following reactions does reduction takes place
Phosphorus is stored under water to prevent it from
The chemical used for coagulation in water purification is