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int64
1
30.2M
Topic
stringclasses
3 values
Subtopic
stringclasses
4 values
Question
stringclasses
13 values
Answer_1
stringclasses
11 values
Explanation_1
stringclasses
12 values
Answer_2
stringclasses
11 values
Explanation_2
stringclasses
11 values
Answer_3
stringclasses
0 values
Explanation_3
stringclasses
0 values
Difficulty
stringclasses
2 values
1
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
2
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
3
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
4
Organic Chemistry
Alkenes
HCl+1-methylcyclohexene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
5
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
6
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
7
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
8
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
9
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
10
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
11
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
12
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
13
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
14
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
15
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
16
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
17
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
18
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
19
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
20
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
21
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
22
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
23
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
24
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
25
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
26
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
27
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
28
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
29
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
30
Organic Chemistry
Alkenes
HCl+1-methylcyclohexene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
31
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
32
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
33
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
34
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
35
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
36
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
37
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
38
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
39
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
40
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
41
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
42
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
43
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
44
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
45
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
46
Organic Chemistry
Alkenes
HCl+2-methylpropene product?
2-chloro-2-methylpropane
HCl adds; yields 2-chloro-2-methylpropane.
tert-butyl chloride
Same: tert-butyl chloride.
null
null
Hard
47
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
48
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
49
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
50
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
51
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
52
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
53
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
54
Organic Chemistry
Alkenes
HBr+1-methylcyclohexene product?
1-bromo-1-methylcyclohexane
HBr adds; yields 1-bromo-1-methylcyclohexane.
1-methyl-1-bromocyclohexane
Same: 1-methyl-1-bromocyclohexane.
null
null
Hard
55
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
56
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
57
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
58
Organic Chemistry
Alkenes
HBr+1-butene product?
2-bromobutane
HBr adds; yields 2-bromobutane.
sec-butyl bromide
Same: sec-butyl bromide.
null
null
Hard
59
Organic Chemistry
Alkenes
HBr+1-methylcyclohexene product?
1-bromo-1-methylcyclohexane
HBr adds; yields 1-bromo-1-methylcyclohexane.
1-methyl-1-bromocyclohexane
Same: 1-methyl-1-bromocyclohexane.
null
null
Hard
60
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
61
Organic Chemistry
Alkenes
HBr+1-methylcyclohexene product?
1-bromo-1-methylcyclohexane
HBr adds; yields 1-bromo-1-methylcyclohexane.
1-methyl-1-bromocyclohexane
Same: 1-methyl-1-bromocyclohexane.
null
null
Hard
62
Physical Chemistry
Kinetics
t1/2,k=0.02s^-1?
34.6s
t1/2=0.693/0.02=34.6s.
~35s
t1/2β‰ˆ0.7/0.02=35s.
null
null
Hard
63
Physical Chemistry
Kinetics
t1/2,k=0.02s^-1?
34.6s
t1/2=0.693/0.02=34.6s.
~35s
t1/2β‰ˆ0.7/0.02=35s.
null
null
Hard
64
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
65
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
66
Organic Chemistry
Alkenes
HBr+1-butene product?
2-bromobutane
HBr adds; yields 2-bromobutane.
sec-butyl bromide
Same: sec-butyl bromide.
null
null
Hard
67
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
68
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
69
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
70
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
71
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
72
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
73
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
74
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
75
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
76
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
77
Organic Chemistry
Alkenes
HBr+1-methylcyclohexene product?
1-bromo-1-methylcyclohexane
HBr adds; yields 1-bromo-1-methylcyclohexane.
1-methyl-1-bromocyclohexane
Same: 1-methyl-1-bromocyclohexane.
null
null
Hard
78
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
79
Organic Chemistry
Alkenes
HCl+2-methylpropene product?
2-chloro-2-methylpropane
HCl adds; yields 2-chloro-2-methylpropane.
tert-butyl chloride
Same: tert-butyl chloride.
null
null
Hard
80
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
81
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
82
Inorganic Chemistry
Oxidation States
Co ox.state in [Co(NH3)6]3+?
+3
[Co(NH3)6]3+: Co=+3.
Co(III)
+3=III.
null
null
Expert
83
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
84
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
85
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
86
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
87
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
88
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
89
Physical Chemistry
Kinetics
t1/2,k=0.05s^-1?
13.9s
t1/2=0.693/0.05=13.9s.
~14s
t1/2β‰ˆ0.7/0.05=14s.
null
null
Hard
90
Physical Chemistry
Kinetics
t1/2,k=0.02s^-1?
34.6s
t1/2=0.693/0.02=34.6s.
~35s
t1/2β‰ˆ0.7/0.02=35s.
null
null
Hard
91
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
92
Physical Chemistry
Kinetics
t1/2,k=0.01s^-1?
69.3s
t1/2=0.693/0.01=69.3s.
~70s
t1/2β‰ˆ0.7/0.01=70s.
null
null
Hard
93
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
94
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
95
Physical Chemistry
Kinetics
t1/2,k=0.02s^-1?
34.6s
t1/2=0.693/0.02=34.6s.
~35s
t1/2β‰ˆ0.7/0.02=35s.
null
null
Hard
96
Organic Chemistry
Alkenes
HBr+1-methylcyclohexene product?
1-bromo-1-methylcyclohexane
HBr adds; yields 1-bromo-1-methylcyclohexane.
1-methyl-1-bromocyclohexane
Same: 1-methyl-1-bromocyclohexane.
null
null
Hard
97
Inorganic Chemistry
Oxidation States
Fe ox.state in [Fe(CN)6]4-?
+2
[Fe(CN)6]4-: Fe=+2.
Fe(II)
+2=II.
null
null
Expert
98
Physical Chemistry
Kinetics
t1/2,k=0.02s^-1?
34.6s
t1/2=0.693/0.02=34.6s.
~35s
t1/2β‰ˆ0.7/0.02=35s.
null
null
Hard
99
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
100
Physical Chemistry
Kinetics
t1/2,k=0.1s^-1?
6.9s
t1/2=0.693/0.1=6.9s.
~7s
t1/2β‰ˆ0.7/0.1=7s.
null
null
Hard
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Chemistry Questions Dataset (62M Rows)

Description

A dataset of 62,941,756 chemistry questions covering Organic Chemistry (Alkenes, Nomenclature), Inorganic Chemistry (Oxidation States), and Physical Chemistry (Kinetics). Each row includes a question, 2-3 answers with explanations, and difficulty level.

Columns

  • Row_ID: Unique identifier (1 to 62,941,756).
  • Topic: Main chemistry category (e.g., Organic Chemistry).
  • Subtopic: Specific topic (e.g., Alkenes).
  • Question: The chemistry question.
  • Answer_1, Answer_2, Answer_3: Possible answers (Answer_3 often N/A).
  • Explanation_1, Explanation_2, Explanation_3: Explanations for each answer.
  • Difficulty: Hard or Expert.

Analysis

  • Unique value counts are visualized in unique_value_counts.png.
  • Sample analysis (based on 100k rows): See image for approximate counts per column.

Usage

from datasets import load_dataset
dataset = load_dataset("XythicK/chemistry")

Size

  • Uncompressed: ~9.06GB
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