February/March 2026 Paper 12

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
5Molecular Shape PolarityHard1 mark
Organic nitrates in photochemical smog can cause breathing difficulties. The diagram shows an example of an organic nitrate molecule.
the skeletal structure of an organic nitrate (a peroxyacetyl nitrate, CH$_3$-CO-O-O-NO$_2$): a methyl carbon bonded to three H atoms and to a carbonyl carbon, which is double-bonded to O and singly bonded through an O-O bridge to NO$_2$; angle 1 is marked between two C-H bonds on the methyl carbon, angle 2 between the C-C bond and the C=O bond on the carbonyl carbon, and angle 3 between the C-O bond and the O-O bond on the ester oxygen
What is the correct order of the bond angles shown in ascending order (smallest first)?