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(i) The mass number of a carbon atom that contains six protons, eight neutrons, and six electrons is
(ii) How many moles of oxygen are required for the complete combustion of 2.2 g of C3H 8 to form carbon dioxide and water?
(iii) In the graph below, curve 1 was obtained from the decomposition of 100 cm3 of 1.0M hydrogen peroxide solution catalysed by manganese (IV) oxide, 2H2O 2?2H 2O+O 2 .
Which alteration/change to the original experimental conditions would produce curve 2?
(iv) How long must a current of 4.00 A be applied to a solution of Cu (2a+q) to produce 2.0 grams of copper metal?
(v) Which of the following hydrocarbons does NOT belong to the same homologous series as the others?
(vi) A solution of pH 1.6 is best described as
(vii) Which among the following equations correctly shows the reaction between chlorine gas and water?
(viii) Hygroscopic and deliquescent substances can be used as
(ix) Which among the following pair of substances are allotropes?
(x) Water can be obtained from a solution of common salt by
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