Chemistry 0620 · IGCSE · Alkenes

Alkenes — practice question

At room temperature and pressure, both butane and but-1-ene are colourless gases.
(a)[1]

Suggest a reason why but-1-ene diffuses more quickly than butane.

(b)[1]

Identify the products made when butane burns completely.

(c(i))[1]

Name the type of reaction that needs ultraviolet light.

(c(ii))[1]

State the role of ultraviolet light in this reaction.

(c(iii))[1]

Name the type of reaction that occurs when one atom of chlorine replaces one atom of hydrogen.

(c(iv))[1]

Determine how many different structural isomers may be formed in this reaction.

(d(i))[1]

Identify the catalyst type used in this reaction.

(d(ii))[4]

Name and draw the displayed formulae for the two possible products.

(e(i))[1]

State the type of polymerisation that but-1-ene undergoes.

(e(ii))[3]

Draw part of the polymer molecule so that three repeat units are shown.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: (but-1-ene) has the smaller relative molecular mass

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI