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Frage 3 Bericht
The green house effect is a climatic condition associated with the presence of excess
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Frage 5 Bericht
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
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Frage 6 Bericht
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
Frage 7 Bericht
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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Frage 8 Bericht
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
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Frage 9 Bericht
Which of the following gases is absorbed from the air dun photosynthesis?
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Frage 11 Bericht
Which of the following gases will bleach moist litmus paper?
Frage 12 Bericht
Sulphur has an oxidation number of +4 in
Frage 14 Bericht
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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Frage 15 Bericht
The Ideal Gas Law is expressed mathematically as
Frage 16 Bericht
The scientist who discovered the zig-zag movement of gas molecules is
Frage 17 Bericht
Which of the following statements is NOT correct of group VII elements? They
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Frage 18 Bericht
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
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Frage 20 Bericht
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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Frage 21 Bericht
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
Frage 22 Bericht
Which of the following salt solutions will have a pH greater than 7?
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Frage 23 Bericht
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]
Frage 28 Bericht
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
Frage 29 Bericht
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
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Frage 30 Bericht
Which of the following equations is NOT balanced?
Frage 31 Bericht
During the extraction of iron in the blast furnance, slag is produced using
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Frage 32 Bericht
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
Frage 33 Bericht
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
Frage 34 Bericht
Which of the following is NOT a fraction of petroleum?
Frage 35 Bericht
The relationship between equilibrium constant and free energy change is represented as
Frage 36 Bericht
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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Frage 42 Bericht
The reaction of an alkanol with alkanioc acid is known as
Frage 44 Bericht
The rate of a reaction usually increases with increase in the concentration of reactants because the
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Frage 45 Bericht
Brain tumors can be located by using an isotope of
Frage 46 Bericht
When air is passed through alkaline pyrogallol and then lime water, the gases left are
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Frage 47 Bericht
The process involved in the decomposition of sugar by an enzyme is called
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