In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar sulphuric acid?
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1978
The periodic classification of elements is an arrangement of the elements in order of their
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1978
When sodium chloride and metallic sodium are each dissolved in water
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1978
Zinc Oxide is a
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1978
When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;
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1978
The oxidation state of chlorine in potassium chlorate is
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1978
An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2. This illustrates the
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1978
A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. T…
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1978
Which of the following metals cannot replace hydrogen from water or steam?
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1978
When each of the nitrates of Potassium, Magnesium and iron is heated,
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1978
The pH of four solutions W, X, Y, Z are 4, 6, 8, 10 respectively, therefore
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1978
When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as
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1978
When heat is absorbed during a chemical reaction, the reaction is said to be
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1978
If 30cm3 of oxygen diffuses through a porous pot in 7 seconds, how long will it take 60cm3 of chlorine to diffuse through the same pot, if the vapour densities of oxygen and chlorine are 16 and 36 respectively?
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1978
The IUPAC names of the compounds CH3COOH and CH2=CH2 are respectively;
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1978
The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as;
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1978
During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment,
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1978
A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by
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1978
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
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1978
Which of the following is not a member of the homologous series of the paraffins (alkanes)?