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Hydrocarbons

Question
CBSEENCH11007760

What happens when:
(i) Propyne is heated with H2 in the presence of nickel at 473 K?

(ii) Water is dropped on aluminium carbide?

(iii) Sodium propionate is heated with sodalime?

(iv) Acetic acid is treated with hydroiodic acid in the presence of red phosphorus at 420 K?

Solution
left parenthesis straight i right parenthesis space Propane space is space produced
CH subscript 3 minus straight C identical to CH space rightwards arrow from Ni divided by 473 space straight K to straight H subscript 2 of CH subscript 3 stack negative space CH with Propene below equals CH subscript 2 rightwards arrow from Ni divided by 473 space straight K to straight H subscript 2 of CH subscript 3 minus stack CH subscript 2 with Propane below minus CH subscript 3
left parenthesis ii right parenthesis space Methane space is space produced
stack Al subscript 4 straight C subscript 3 with Aluminium space carbide below space plus space 12 straight H subscript 2 straight O space rightwards arrow space space 4 Al left parenthesis OH right parenthesis subscript 3 space plus space stack 3 CH subscript 4 with Methane below
(iii) Ethane is produced
stack CH subscript 3 CH subscript 2 COONa with Sodium space propionate below space plus space NaOH space rightwards arrow with CaO on top space CH subscript 3 space minus space CH subscript 3 space plus space stack Na subscript 2 CO subscript 3 with Ethane below

(iv) Ethane is produced
             CH subscript 3 COOH space plus space 6 Hl space rightwards arrow from red space straight P to 420 space straight K of space stack CH subscript 3 space minus space CH subscript 3 with Ethane below space plus space 3 straight I subscript 2 space plus space 2 straight H subscript 2 straight O