Non-metals and their compounds questions | form four Chemistry

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#	Question
1	(i) Write the reaction equations involved in the industrial manufacturing of sulphuric acid starting with sulphur dioxide in the contact process. (ii) Explain why sulphur trioxide is not dissolved directly in water to obtain sulphuric acid in contact process. Short answers
2	The following flow diagram shows the stages in the contact process. (i) Give the names of element A, catalyst B and an acid C. (ii) Write a balanced chemical equation for the formation of sulphur trioxide in stage 2. Short answers
3	Carbon dioxide can be prepared by adding an acid to calcium carbonate. (i) Using a named acide, write a balanced chemical equation for the reaction. (ii) Name all the products formed in (i). Short answers
4	Which among the following equations correctly shows the reaction between chlorine gas and water? $Cl_{2(g)}+H_{2}O_{(l)} ightarrow Cl_{2(g)}$ $2Cl_{2(g)}+2H_{2}O_{(l)} ightarrow 4Cl_{(aq)}^{-}+O_{2(g)}+2H_{2(g)}$ $Cl_{2(g)}+H_{2}O_{(l)} ightarrow HCl_{(aq)}+HOCL_{(aq)}$ $2Cl_{2(g)}+3H_{2}O_{(l)} ightarrow Cl_{2(g)}+2H_{3}O^{+}$ Multiple choices
5	Which among the following pair of substances are allotropes? $H_{2}O , and , H_{2}O_{2}$ $^{12}C , and , ^{14}C$ $P_{4} , and , P_{8}$ $H_{2} , and , 2H^{+}$ $H^{+} , and , H_{3}O$ Multiple choices