Organic chemistry questions | form four Chemistry

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#	Question
1	The following equation is a propagation step in the chlorination of methane: A. $Cl_2 ightarrow Cl^ullet +Cl^ullet$ $CH_3^ullet + Cl^ullet ightarrow CH_3Cl$ $CH_3^ullet + Cl_2 ightarrow CH_3Cl + Cl^ullet$ $CH_4 + Cl^ullet ightarrow CH_3Cl + H^ullet$ $CH_3^ullet + Cl_2 ightarrow Ch_2Cl + Cl^ullet .$ Multiple choices
2	$C_2H_4Cl$ can be represented in different structures which are called homologous series isomers structural formulae identical structures condensed structures. Multiple choices
3	Consider a four carbon hydrocarbon ( $C_4H_n$ ), where n is an integer. Give the name of homologous series, molecular formula and structural formula for different isomers of the compound formed by each homologous. In each case indicate the causes of isomerism. Short answers
4	Which of the following compounds does NOT belong to the alkenes homologous series? $C_{2}H_{4}$ $C_{3}H_{6}$ $C_{4}H_{8}$ $C_{5}H_{10}$ $C_{6}H_{14}$ Multiple choices
5	Which equation represents the combustion of methane with the products collected at 120°C? $CH_{4(l)} + 2O_{2(g)} ightarrow CO_{2(g)} + 2H_{2} O (l)$ $CH_{4(g)} + 2O_{2(l)} ightarrow CO_{2(g)} + 2H_{2} O (l)$ $CH_{4(g)} + 2O_{2(g)} ightarrow CO_{2(g)} + 2H_{2} O (g)$ $CH_{4(l)} + 2O_{2(l)} ightarrow CO_{2(l)} + 2H_{2} O (g)$ $CH_{4(l)} + 2O_{2(g)} ightarrow CO_{2(g)} + 2H_{2} O (g)$ Multiple choices
6	(i) Define isomerism. (ii) Draw and name two structural formulae of the isomers of $C_{4}H_{8 }$ . Short answers
7	When methane undergoes substitutional reaction with excess chlorine, what is the final product? Chloromethane Dichloromethane Trichloromethane Tetrachloromethane Monochloromethane Multiple choices