1.

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)(iv) Substitution reactions are characteristic reactions of …………….. (alkynes / alkenes / alkanes)(v) In Period 3, the most metallic element is …………….. (sodium / magnesium / aluminium)

Answer»

(i) dehydration

(ii) sodium hydrogen sulphate

(iii) nitrogen trichioride

(iv) alkanes

(v) sodium



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