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Question 1 Report
The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]
Answer Details
Question 2 Report
Which of the following equations is NOT balanced?
Question 3 Report
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
Question 5 Report
Sulphur has an oxidation number of +4 in
Question 7 Report
The reaction of an alkanol with alkanioc acid is known as
Question 8 Report
Which of the following is NOT a fraction of petroleum?
Question 9 Report
Which of the following compounds will undergo thermal dissociation?
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Question 10 Report
Which of the following statements is NOT correct of group VII elements? They
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Question 12 Report
Brain tumors can be located by using an isotope of
Question 13 Report
Which of the following gases will bleach moist litmus paper?
Question 14 Report
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
Question 15 Report
The scientist who discovered the zig-zag movement of gas molecules is
Question 16 Report
The process involved in the decomposition of sugar by an enzyme is called
Question 17 Report
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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Question 19 Report
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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Question 20 Report
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
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Question 21 Report
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]
Question 23 Report
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
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Question 25 Report
The green house effect is a climatic condition associated with the presence of excess
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Question 27 Report
The Ideal Gas Law is expressed mathematically as
Question 30 Report
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
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Question 31 Report
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
Question 34 Report
The relationship between equilibrium constant and free energy change is represented as
Question 35 Report
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
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Question 37 Report
The rate of a reaction usually increases with increase in the concentration of reactants because the
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Question 38 Report
During the extraction of iron in the blast furnance, slag is produced using
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Question 39 Report
Which of the following salt solutions will have a pH greater than 7?
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Question 41 Report
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
Question 42 Report
Which of the following gases is absorbed from the air dun photosynthesis?
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Question 43 Report
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
Question 45 Report
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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Question 47 Report
When air is passed through alkaline pyrogallol and then lime water, the gases left are
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