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Pregunta 2 Informe
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
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Pregunta 3 Informe
What volume of carbon (IV) oxide in dm 3 is produced at s.t.p. when 2.50g of CaCO3 reacts with excess acid according to the following equation? CaCO3(s) + 2HCI(aq) → CaCl2(aq) + H2O(1) + CO2(g)
[CaCO2 100; molar volume of a gas at s.t.p. = 22.4dm 3]
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Pregunta 4 Informe
During the extraction of iron in the blast furnance, slag is produced using
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Pregunta 5 Informe
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
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Pregunta 6 Informe
Which of the following salt solutions will have a pH greater than 7?
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Pregunta 8 Informe
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
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Pregunta 9 Informe
When air is passed through alkaline pyrogallol and then lime water, the gases left are
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Pregunta 11 Informe
The green house effect is a climatic condition associated with the presence of excess
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Pregunta 13 Informe
Which of the following compounds will undergo thermal dissociation?
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Pregunta 14 Informe
In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are
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Pregunta 15 Informe
The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]
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Pregunta 16 Informe
Which of these compounds has the greatest ionic character?
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Pregunta 17 Informe
Which of the following metals is NOT extracted by electrolysis?
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Pregunta 18 Informe
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
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Pregunta 19 Informe
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
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Pregunta 21 Informe
The reaction of an alkanol with alkanioc acid is known as
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Pregunta 22 Informe
How many zones are present in a luminous Bunsen burner flame?
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Pregunta 23 Informe
Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding
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Pregunta 25 Informe
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
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Pregunta 26 Informe
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
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Pregunta 27 Informe
Which of the following non-metals reacts most readily with metals?
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Pregunta 30 Informe
The scientist who discovered the zig-zag movement of gas molecules is
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Pregunta 31 Informe
What kind of bond exist between carbon and oxygen in C03 2-?
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Pregunta 33 Informe
Which of the following gases will bleach moist litmus paper?
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Pregunta 34 Informe
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
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Pregunta 35 Informe
The following equations represent redox reactions EXCEPT
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Pregunta 36 Informe
What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]
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Pregunta 37 Informe
X = - log10 H+]
What does X stand for in the expression above?
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Pregunta 38 Informe
Which of the following statements is NOT correct of group VII elements? They
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Pregunta 40 Informe
Which of the following gases is absorbed from the air dun photosynthesis?
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Pregunta 41 Informe
The process involved in the decomposition of sugar by an enzyme is called
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Pregunta 42 Informe
The relationship between equilibrium constant and free energy change is represented as
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Pregunta 45 Informe
The rate of a reaction usually increases with increase in the concentration of reactants because the
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Pregunta 46 Informe
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
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