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During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment,
A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by
Which of the following metals cannot replace hydrogen from water or steam
When each of the nitrates of Potassium, Magnesium and iron is heated,
The pH of four solutions W, X, Y, Z are 4, 6, 8, 10 respectively, therefore
When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as
When heat is absorbed during a chemical reaction, the reaction is said to be
The oxidation state of chlorine in potassium chlorate is?
An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2. This illustrates the
The periodic classification of elements is an arrangement of the elements in order of their
DIVINE EMMANUEL
B. the litmus turns blue and oxygen is evolved
C. the litmus turns blue and hydrogen is evolved
D. the litmus turns red and oxygen is evolved
E. the litmus turns red and then becomes colourless
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