C10 organic reactions

Question 1

formula for alkenes of C=C bond

Answer 1

CnH2n

Question 2

what does complete combustion of alkene form

Answer 2

carbon dioxide and wateer

Question 3

alkenes reaction with halogens

Answer 3

ethene *bromine(orange)= colourless product

Question 4

what are alkenes

Answer 4

unsatured compounds

Question 5

what does addition of hydrogen molecule across the double bond

Answer 5

will form a satured hydrocarbon

Question 6

what is a alcohol

Answer 6

homologous series.
replacing an H atom with an -OH in an alkane wuold form an alcohol

Question 7

what are esters

Answer 7

replace H atom with -COOH by a hydrocarbon group

Question 8

what group do carboxylic acids contain

Answer 8

the -COOH group

Question 9

when are alcohols used

Answer 9

solvents and fuels, etahnol main alcohol in drinks

Question 10

what does combustion of ethanol cause

Answer 10

burning in air creating carbon dioxide and water

Question 11

ethanol with sodium

Answer 11

form solution of sodium alkoxide and hydrogen gas given off

Question 12

how to oxidise an alcohol

Answer 12

chemical oxidisnig agents pr by the action of microbes in air. ethanoic acis is the main acid in vinegar

Question 13

pH of carboxylic solution

Answer 13

lesser than 7, they are weak acids because they a higher pH value of strong acids in same concentration.

Question 14

eg of carboxylic acid

Answer 14

ethanoic acid

Question 15

how are esters made

Answer 15

reacting carboxylic acid with an alcohol with a strong catalyst

Question 16

characteristics of esters and uses

Answer 16

volatile an fragrant compounds. used in perfumes and flavouring