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Chemistry 2013 QUIZ STUDY
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The saponification of an alkanoate to produce soap and alkanol involves
What volume of carbon(ll) oxide is produced by reacting excess carbon With 10dm3 of oxygen?
From the diagram above, an ideal gas is represented by
The radioactive emission with the least ionization power is
Which of the following molecules is held to ether by hydrogen bond?
The bond formed between two elements with electron configurations 1s2 2s2 2p6 3s2 and 1s2 2s2 2p4 is
Steam changes the colour of anhydrous cobalt(ll) chloride from
white to red
blue to white.
blue to pink.
white to blue.
An example of a hygroscopic substance is
lf 24.4 g of lead(ll) trioxonitrate(V) were dissolved in 42 g of distilled water at 20°C; calculate the solubility of the solute in gdm-3.
10.0 dm3 of water was added, to 2.0 mol dm-3 of 2.5dm3 solution of HCl. What IS the concentration of the final solution in mol dm-3 ?
2H2O(|)+2F2(g) → 4HF(aq) + O2(g)
in the reaction above, the substance that is being reduced is
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s).
In the reaction above, the oxidizmg agent is
Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5A is passed through acidified water for 193s
[F=96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3]
2SO2(g) + O2(g) ⇌ 2SO3(g)
In the reaction above, the concentration of SO3(g) can be increased by
decreasing the pressure.
decreasing the temperature.
increasing the temperature.
the addition of catalyst
In the graph above, l activation energy of the catalyzed reaction is
3Fe(s)+4H2O(g) ⇌ Fe3O4(s) +4H2(g)
The equilibrium constant, K, of the reaction above is represented as
Which of the following gases is employed as an anaesthesia?
The compound above is an
The compound that will react with sodium hydroxide to form salt and water only is
Which of the following compounds in soluton will turn red litmus paper blue?
The dehydration of ammonium salt of alkanoic acids produces a compound with the general fomula.
Which of the following fractions is used as raw material for the cracking process?
An organic compund with a pleasant smell is likely to have a general formula
A primary amide is generally represented by the formula
The IUPAC nomenclature for the compound above is
An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formula.