Fill in the blanks with the choices given in brackets:
(i) Conversion of ethanol to ethene by the action of concentrated sulphuric acid is an example of ............... (dehydration/dehydrogenation/dehydrohalogenation)
(ii) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the products formed is ............... (sodium hydrogen sulphate / sodium sulphate / chlorine)
(iii) Ammonia reacts with excess chlorine to form ............... (nitrogen / nitrogen trichloride / ammonium chloride)
(iv) Substitution reactions are characteristic reactions of ............... (alkynes / alkenes / alkanes)
(v) In Period 3, the most metallic element is ............... (sodium / magnesium / aluminium)
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(i) Conversion of ethanol to ethene by the action of concentrated sulphuric acid is an example of dehydration
(ii) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the products formed is sodium hydrogen sulphate (sodium hydrogen sulphate / sodium sulphate / chlorine)
(iii) Ammonia reacts with excess chlorine to form nitrogen trichloride
(iv) Substitution reactions are characteristic reactions of alkanes
(v) In Period 3, the most metallic element is sodium.