Question

(a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbon. (b) Name the products formed when ethane burns in air. Write the balanced chemical equation for the reaction showing the types of energies liberated. (c) Why is reaction between methane and chlorine in the presence of sunlight considered a substitution reaction?

Answer 1

a) Testing them with iodine solution
b)the product is methane and hydrogen gas
c) Because chlorine substitutes one hydrogen....

Answer 2

$\huge\sf\red{Answer}$

a) Here we shall pass the vapours of the samples of saturated and unsaturated hydrocarbons into bromide water which is taken in two seperate test tubes. So here one will discharge the colour of bromine water is the unsaturated solution and then the remaining will obviously will be the saturated hydrocarbon

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b) So on doing so we obtain carbondioxide and water and also produce heat and light

Equation :

$\sf{2C_2H_6(g)+7O_2(g)\dashrightarrow{}4CO_2(g)+6H_2O(l)+Heat+Light}$

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c) We consider the reaction between the two as a substitution reaction because the hydrogen ions of the methane that is, $\sf CH_4$ gets substituted by chlorine atoms

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