A LEVEL CHEMISTRY OCR A PAPER 2 Exam Study Guide – Practice Questions with Verified Answers. GRADED A+. Latest 2026/2027 Update

A LEVEL CHEMISTRY OCR A
PAPER 2 Exam Study Guide –
Practice Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update




Q1 a] >>> This question is about reactions of organic compounds containing
carbon, hydrogen and oxygen.
A chemist investigates two reactions of alcohol A, shown below.
[refer to the A LEVEL OCR A CHEMISTRY PAPER 2 PMT QP for the picture of alcohol
A]
What is the systematic name of alcohol A ? - answer- 3-methylbutan-2-ol


Q1 b] >>> What is the structural formula of alcohol A ? - answer-
CH3CH[CH3]CHOHCH3


Q1 c] >>> The chemist heats alcohol A with an acid catalyst to form a mixture
containing two alkenes.

, Draw the structures of the two alkenes formed in this reaction. -
answer- Alkene 1: CH3C[CH3]CHCH3 [3-methylbut-2-ene] Alkene 2:
CH3CH[CH3]CHCH2 [3-methylbut-1-ene]


Q1 d] >>> The chemist heats alcohol A with sodium chloride and sulfuric acid.
Construct a balanced equation for this reaction. Show structures for the organic
compounds in your equation. - answer- Equation A: 2CH3CH[CH3]CHOHCH3 +
2NaCl + H2SO4 >>> 2CH3CH[CH3]CHClCH3 + Na2SO4
OR
Equation B: CH3CH[CH3]CHOHCH3 + NaCl + H2SO4 >>>
CH3CH[CH3]CHClCH3 + NaHSO4


Q2 >>> Compound B, shown below, is refluxed with excess acidified potassium
dichromate(VI) to form a single organic product. [refer to the A LEVEL OCR A
CHEMISTRY PAPER 2 PMT QP for the structure of compound B]
Complete the equation for this reaction. - answer- Formulae equation:
CH3C[CH3]OHCHOHCH2OH + 3[O] >>>
CH3C[CH3]OHCOCOOH + 2H2O
Word equation:
3-methylbutane-1,2,3-triol + 3[O] >>>
3-methyl-3-hydroxy-2-oxobutanoic acid


Q3 >>> The flowchart below shows some reactions of compound C.
[refer to the A LEVEL OCR A CHEMISTRY PAPER 2 PMT QP for the flowchart] In the
boxes, draw the organic products of these reactions. - answer- Compound C: but-
2-ene-
1,4-dioic acid