Row_ID
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 |
|---|---|---|---|---|---|---|---|---|---|---|
1,101 |
Organic Chemistry
|
Alkenes
|
HBr+2-methylpropene product?
|
unknown
|
HBr adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,102 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,103 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,104 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.02s^-1?
|
34.6s
|
t1/2=0.693/0.02=34.6s.
|
~35s
|
t1/2≈0.7/0.02=35s.
| null | null |
Hard
|
1,105 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,106 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,107 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,108 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,109 |
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
|
1,110 |
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
|
1,111 |
Organic Chemistry
|
Alkenes
|
HCl+1-butene product?
|
unknown
|
HCl adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,112 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,113 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,114 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,115 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,116 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,117 |
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
|
1,118 |
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
|
1,119 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,120 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,121 |
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
|
1,122 |
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
|
1,123 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,124 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,125 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,126 |
Organic Chemistry
|
Alkenes
|
HCl+1-butene product?
|
unknown
|
HCl adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,127 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,128 |
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
|
1,129 |
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
|
1,130 |
Organic Chemistry
|
Alkenes
|
HBr+2-methylpropene product?
|
unknown
|
HBr adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,131 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,132 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,133 |
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
|
1,134 |
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
|
1,135 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,136 |
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
|
1,137 |
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
|
1,138 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.02s^-1?
|
34.6s
|
t1/2=0.693/0.02=34.6s.
|
~35s
|
t1/2≈0.7/0.02=35s.
| null | null |
Hard
|
1,139 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,140 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,141 |
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
|
1,142 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,143 |
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
|
1,144 |
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
|
1,145 |
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
|
1,146 |
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
|
1,147 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,148 |
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
|
1,149 |
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
|
1,150 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,151 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,152 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,153 |
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
|
1,154 |
Organic Chemistry
|
Alkenes
|
HBr+2-methylpropene product?
|
unknown
|
HBr adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,155 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,156 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,157 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,158 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,159 |
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
|
1,160 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.02s^-1?
|
34.6s
|
t1/2=0.693/0.02=34.6s.
|
~35s
|
t1/2≈0.7/0.02=35s.
| null | null |
Hard
|
1,161 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,162 |
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
|
1,163 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,164 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,165 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,166 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.02s^-1?
|
34.6s
|
t1/2=0.693/0.02=34.6s.
|
~35s
|
t1/2≈0.7/0.02=35s.
| null | null |
Hard
|
1,167 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,168 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,169 |
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
|
1,170 |
Organic Chemistry
|
Alkenes
|
HBr+1-butene product?
|
2-bromobutane
|
HBr adds; yields 2-bromobutane.
|
sec-butyl bromide
|
Same: sec-butyl bromide.
| null | null |
Hard
|
1,171 |
Organic Chemistry
|
Alkenes
|
HBr+1-butene product?
|
2-bromobutane
|
HBr adds; yields 2-bromobutane.
|
sec-butyl bromide
|
Same: sec-butyl bromide.
| null | null |
Hard
|
1,172 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,173 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,174 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,175 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,176 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,177 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,178 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,179 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,180 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,181 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,182 |
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
|
1,183 |
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
|
1,184 |
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
|
1,185 |
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
|
1,186 |
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
|
1,187 |
Organic Chemistry
|
Alkenes
|
HBr+2-methylpropene product?
|
unknown
|
HBr adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,188 |
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
|
1,189 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.1s^-1?
|
6.9s
|
t1/2=0.693/0.1=6.9s.
|
~7s
|
t1/2≈0.7/0.1=7s.
| null | null |
Hard
|
1,190 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.02s^-1?
|
34.6s
|
t1/2=0.693/0.02=34.6s.
|
~35s
|
t1/2≈0.7/0.02=35s.
| null | null |
Hard
|
1,191 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.05s^-1?
|
13.9s
|
t1/2=0.693/0.05=13.9s.
|
~14s
|
t1/2≈0.7/0.05=14s.
| null | null |
Hard
|
1,192 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
1,193 |
Organic Chemistry
|
Alkenes
|
HBr+2-methylpropene product?
|
unknown
|
HBr adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,194 |
Organic Chemistry
|
Nomenclature
|
Name CH3CH(OH)CH2CHO?
|
3-hydroxybutanal
|
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
|
beta-hydroxybutyraldehyde
|
3-hydroxybutanal=beta-hydroxybutyraldehyde.
| null | null |
Hard
|
1,195 |
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
|
1,196 |
Organic Chemistry
|
Alkenes
|
HCl+1-butene product?
|
unknown
|
HCl adds; yields unknown.
|
unknown
|
Same: unknown.
| null | null |
Hard
|
1,197 |
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
|
1,198 |
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
|
1,199 |
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
|
1,200 |
Physical Chemistry
|
Kinetics
|
t1/2,k=0.01s^-1?
|
69.3s
|
t1/2=0.693/0.01=69.3s.
|
~70s
|
t1/2≈0.7/0.01=70s.
| null | null |
Hard
|
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