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Question 1 Report
Which of the following gases will bleach moist litmus paper?
Question 4 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 6 Report
The relationship between equilibrium constant and free energy change is represented as
Question 7 Report
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
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Question 8 Report
Which of the following equations is NOT balanced?
Question 9 Report
Brain tumors can be located by using an isotope of
Question 10 Report
During the extraction of iron in the blast furnance, slag is produced using
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Question 11 Report
Which of the following non-metals reacts most readily with metals?
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Question 12 Report
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
Question 13 Report
When air is passed through alkaline pyrogallol and then lime water, the gases left are
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Question 14 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 15 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 17 Report
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
Question 19 Report
Which of the following compounds will undergo thermal dissociation?
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Question 20 Report
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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Question 21 Report
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
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Question 22 Report
Which of the following gases is absorbed from the air dun photosynthesis?
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Question 25 Report
Which of the following is NOT a fraction of petroleum?
Question 27 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 28 Report
Sulphur has an oxidation number of +4 in
Question 29 Report
Which of the following statements is NOT correct of group VII elements? They
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Question 30 Report
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
Question 31 Report
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
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Question 33 Report
The scientist who discovered the zig-zag movement of gas molecules is
Question 35 Report
The reaction of an alkanol with alkanioc acid is known as
Question 37 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 39 Report
The green house effect is a climatic condition associated with the presence of excess
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Question 40 Report
The Ideal Gas Law is expressed mathematically as
Question 43 Report
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
Question 44 Report
The rate of a reaction usually increases with increase in the concentration of reactants because the
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Question 45 Report
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
Question 46 Report
The process involved in the decomposition of sugar by an enzyme is called
Question 47 Report
Which of the following salt solutions will have a pH greater than 7?
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