May/June 2026 Paper 11

2026 · 40 questions · 40 parts · 40 marks

0/40 marks
0Correct0Partial0Wrong40Unattempted
Filters0 active

Questions

Select a part to jump to its question

Finish set
Q1
1
–/1 mk
Q2
2
–/1 mk
Q3
3
–/1 mk
Q4
4
–/1 mk
Q5
5
–/1 mk
Q6
6
–/1 mk
Q7
7
–/1 mk
Q8
8
–/1 mk
Q9
9
–/1 mk
Q10
10
–/1 mk
Q11
11
–/1 mk
Q12
12
–/1 mk
Q13
13
–/1 mk
Q14
14
–/1 mk
Q15
15
–/1 mk
Q16
16
–/1 mk
Q17
17
–/1 mk
Q18
18
–/1 mk
Q19
19
–/1 mk
Q20
20
–/1 mk
Q21
21
–/1 mk
Q22
22
–/1 mk
Q23
23
–/1 mk
Q24
24
–/1 mk
Q25
25
–/1 mk
Q26
26
–/1 mk
Q27
27
–/1 mk
Q28
28
–/1 mk
Q29
29
–/1 mk
Q30
30
–/1 mk
Q31
31
–/1 mk
Q32
32
–/1 mk
Q33
33
–/1 mk
Q34
34
–/1 mk
Q35
35
–/1 mk
Q36
36
–/1 mk
Q37
37
–/1 mk
Q38
38
–/1 mk
Q39
39
–/1 mk
Q40
40
–/1 mk
33Aldehydes KetonesMedium1 mark
When an acidified aqueous solution of potassium cyanide is added to propanone, an addition reaction takes place. Which structure shows the intermediate formed during this reaction?
Structure A: in square brackets, a central carbon bonded to two CH3 groups and to a CN group, carrying a positive charge (+) beneath the central carbon, i.e. (CH3)2C(+)-CN, with no oxygen present.
Structure B: in square brackets, a central carbon bonded to two CH3 groups and to an OH group, carrying a positive charge (+) beneath the central carbon, i.e. (CH3)2C(+)-OH, with no CN present.
Structure C: in square brackets, a central carbon bonded to two CH3 groups, to an O atom drawn with no charge shown, and to a CN group carrying a negative charge (CN-) below the central carbon.
Structure D: in square brackets, a central carbon bonded to two CH3 groups, to an O atom carrying a negative charge (O-), and to a neutral CN group, i.e. (CH3)2C(O-)(CN), the alkoxide intermediate.