JAMB UTME - Chemistry - 1980
Ibeere 1 Ìròyìn
A sample of an oxide of mercury weighed 1.00g. When this was heated, oxygen was given off, and 1.00g of mercury metal only was left. What is the formula of the oxide?
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Ibeere 2 Ìròyìn
10cm3 of CO is mixed and sparked with 100cm3 of air containing 21% O2. If all the volumes measured at S.T.P. the volume of resulting gases would be?
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Ibeere 3 Ìròyìn
Which of the following is the correct order in the above diagram increasing boiling point, of the isomeric \(C_{5}H_{12}\) compounds?
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Ibeere 6 Ìròyìn
The following arrangement of elements in order of decreasing number of outer electrons; One of the elements is wrongly placed. Which is it? ALUMINIUM, CHLORINE, SILICON, MAGNESIUM AND SODIUM.
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Ibeere 7 Ìròyìn
Given the mean atomic mass of chlorine prepared in the laboratory to be 35.5 and assuming that chlorine contains two isotopes of mass number 35 nad 37, what is the percentage composition of the isotope of mass number 35?
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Ibeere 9 Ìròyìn
Which of the following is acceptable as the organic product of the reaction of ethanoic acid and ethanol with an acid catalyst?
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Ibeere 12 Ìròyìn
The following graph demonstrates the rate of reaction between calcium carbonate (marble)and dilute hydrochloric acid. The graph shows that the rate of reaction is initially greatest when
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Ibeere 15 Ìròyìn
Detergents are more advantageous than soaps in hard water districts because
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Ibeere 16 Ìròyìn
A solution X on mixing with AgNO3 solution, gives a white precipitate solution in NH3. A Solution Y, when added to X, also gives a white precipiate which is soluble on boiling. Solution Y contains?
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Ibeere 17 Ìròyìn
On heating, under suitable conditions, 1 litres of monoatomic gas,X, combines with 11/2 litres of an oxide, What is the formula of the oxide.
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Ibeere 19 Ìròyìn
In which of the following is the oxidation state of oxygen different from its value in water?
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Ibeere 20 Ìròyìn
Element X has a total of 19 electrons and can react with oxygen to form an oxide. Which of the following statements is NOT true of the oxide of the element?
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Ibeere 22 Ìròyìn
How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm3 of 6M HCl?
(Mg=24, H=1, Cl=35.5)
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Ibeere 23 Ìròyìn
If one of the following oxides is heated with hydrogen or carbon using a bunsen burner, it is not reduced to the metal. Which one is it?
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Ibeere 25 Ìròyìn
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with
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Ibeere 26 Ìròyìn
When dilute hydrochloric acid is added to iron(ll)sulphide, the gas evolved will?
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Ibeere 28 Ìròyìn
Which of the following compounds will take up the molecules of bromine?
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Ibeere 29 Ìròyìn
If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litre of water,and resulting solution mixed thoroughly, the resulting sulpuric acid concentration will be?
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Ibeere 31 Ìròyìn
Which of the following statements is an exception in the assumptions of the kinetic theory of gases?
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Ibeere 32 Ìròyìn
The chemical reaction which takes place at the anode (positive electrode) in electrolysis is?
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Ibeere 33 Ìròyìn
Which of the following silver halides is readily soluble in ammonium hydroxide?
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Ibeere 35 Ìròyìn
Copper sulphate solution was electrolysed using the apparatus show above. Which of the following changes are observed?
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Ibeere 36 Ìròyìn
When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution. This deep blue solution is a
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Ibeere 37 Ìròyìn
Which of the following derivatives of nitrogen affords an aqueous solution having a pH of less that 7?
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Ibeere 38 Ìròyìn
20 cm3 of 1 M H\(_2\)SO\(_4\) is mixed 20 cm\(^3\) of 1 M NaOH. The resulting solution is?
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Ibeere 40 Ìròyìn
The boiling point of water is higher than that of methanol because?
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Ibeere 41 Ìròyìn
When ethene gas reacts with chlorine gas to form 1, 2-dichloroethene, the reaction is called?
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Ibeere 43 Ìròyìn
The alloy duralumin is used for the building of aeroplanes because it?
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Ibeere 44 Ìròyìn
Cellulose and starches can be classified as one of the following?
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Ibeere 46 Ìròyìn
A cold aqueous solution of sodium chloride is electrolyzed using a graphite anode and an iron cathode. In the course of the electrolysis the electrolyte is continuously stirred. The liquid left after electrolysis will therefore consist of?
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