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Ajụjụ 1 Ripọtì
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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Ajụjụ 2 Ripọtì
Which of the following equations is NOT balanced?
Ajụjụ 4 Ripọtì
The rate of a reaction usually increases with increase in the concentration of reactants because the
Ajụjụ 6 Ripọtì
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
Ajụjụ 7 Ripọtì
The green house effect is a climatic condition associated with the presence of excess
Ajụjụ 9 Ripọtì
Which of the following non-metals reacts most readily with metals?
Ajụjụ 10 Ripọtì
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]
Ajụjụ 12 Ripọtì
Which of the following gases is absorbed from the air dun photosynthesis?
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Ajụjụ 13 Ripọtì
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
Ajụjụ 14 Ripọtì
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
Ajụjụ 15 Ripọtì
Sulphur has an oxidation number of +4 in
Ajụjụ 17 Ripọtì
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
Ajụjụ 18 Ripọtì
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
Ajụjụ 19 Ripọtì
The reaction of an alkanol with alkanioc acid is known as
Ajụjụ 20 Ripọtì
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
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Ajụjụ 21 Ripọtì
The relationship between equilibrium constant and free energy change is represented as
Ajụjụ 22 Ripọtì
A salt which loses its mass when exposed to air is
Ajụjụ 24 Ripọtì
Which of the following statements is NOT correct of group VII elements? They
Ajụjụ 25 Ripọtì
The furring of kettles and boilers are caused by
Ajụjụ 26 Ripọtì
Which of the following gases will bleach moist litmus paper?
Ajụjụ 27 Ripọtì
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
Ajụjụ 28 Ripọtì
When air is passed through alkaline pyrogallol and then lime water, the gases left are
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Ajụjụ 30 Ripọtì
Which of the following salt solutions will have a pH greater than 7?
Ajụjụ 31 Ripọtì
A neon atom is chemically nonreactive because
Ajụjụ 32 Ripọtì
During the extraction of iron in the blast furnance, slag is produced using
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Ajụjụ 33 Ripọtì
Which of the following is NOT a fraction of petroleum?
Ajụjụ 35 Ripọtì
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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Ajụjụ 36 Ripọtì
Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding
Ajụjụ 37 Ripọtì
The scientist who discovered the zig-zag movement of gas molecules is
Ajụjụ 38 Ripọtì
The process involved in the decomposition of sugar by an enzyme is called
Ajụjụ 39 Ripọtì
Brain tumors can be located by using an isotope of
Ajụjụ 40 Ripọtì
The Ideal Gas Law is expressed mathematically as
Ajụjụ 42 Ripọtì
What kind of bond exist between carbon and oxygen in C03 2-?
Ajụjụ 43 Ripọtì
Which of the following compounds will undergo thermal dissociation?
Ajụjụ 44 Ripọtì
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
Ajụjụ 45 Ripọtì
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
Ajụjụ 46 Ripọtì
Non-polar molecules are held together by
Ajụjụ 47 Ripọtì
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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