PAPER MCQS
Best MCQs for Exams
Subjects
Exams
CSS MCQs
PMS MCQs
FPSC MCQs
PPSC MCQs
NTS MCQs
Past Papers
Jobs
Test Mode
🏆 Leaderboard
Contact
Login
Register
Join WhatsApp Channel
Daily MCQs & Exam Updates
Past Papers
Practice
Past Paper MCQs Practice
PPSC Past paper 2025 (Office Assistant)
PPSC · 2025 · Practice with instant answers and explanations
Practice Mode
100 Past Paper MCQs
Question 55 of 100
55%
Practice Time
00:00
Question
55
Past Paper
PPSC
The primary cause of ocean acidification is an excess of:
A
Oxygen
B
Carbon dioxide (CO2)
C
Nitrogen
D
Sulfur dioxide
Correct Answer:
Option B — Carbon dioxide (CO2)
Explanation:
Carbon dioxide (CO2) is the correct answer according to the supplied Paper 211 answer key.
Previous
Show Answer
Next
Question Navigator
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100