Chemistry

Question 1

1Cracking of long-chain alkanes produces

Easy

A. only water B. salts C. shorter alkanes and alkenes D. only polymers

Question 2

2The general formula of the alkynes is

Hard

A. CₙH₂ₙ B. CₙH₂ₙ₊₁ C. CₙH₂ₙ₋₂ D. CₙH₂ₙ₊₂

Question 3

3Alkenes typically undergo

Easy

A. no reactions B. addition reactions C. neutralisation D. only substitution reactions

Question 4

4The first member of the alkanoic acids is

Easy

A. ethanoic acid B. methanoic acid C. butanoic acid D. propanoic acid

Question 5

5The functional group of the alkanoic acids is

Easy

A. C=C B. −OH C. −COOH D. −NH₂

Question 6

6An alkanoic acid reacts with an alkanol to form

Easy

A. a polymer only B. an alkene C. an ester and water D. a salt and hydrogen

Question 7

7Ethanol can be made from sugar by

Easy

A. fermentation with yeast B. cracking C. distillation of air D. electrolysis

Question 8

8Ethanol is produced industrially by

Easy

A. electrolysis B. cracking only C. distilling seawater D. fermentation of sugars or hydration of ethene

Question 9

9The product of the reaction between ethene and hydrogen bromide is

Hard

A. ethanol B. bromoethane C. ethyne D. 1,2-dibromoethane

Question 10

10Breaking large hydrocarbon molecules into smaller, more useful ones is

Easy

A. polymerisation B. saponification C. cracking D. esterification