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
1,801
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,802
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
1,803
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
1,804
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,805
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
1,806
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,807
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,808
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
1,809
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,810
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
1,811
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
1,812
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
1,813
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,814
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
1,815
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
1,816
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
1,817
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
1,818
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,819
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
1,820
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,821
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,822
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,823
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,824
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
1,825
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,826
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
1,827
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
1,828
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
1,829
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
1,830
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
1,831
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
1,832
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,833
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
1,834
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
1,835
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
1,836
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
1,837
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
1,838
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
1,839
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
1,840
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
1,841
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
1,842
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,843
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
1,844
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
1,845
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
1,846
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
1,847
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,848
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
1,849
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,850
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
1,851
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
1,852
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
1,853
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
1,854
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
1,855
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
1,856
Organic Chemistry
Alkenes
HCl+1-methylcyclohexene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,857
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
1,858
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
1,859
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
1,860
Organic Chemistry
Alkenes
HBr+1-butene product?
2-bromobutane
HBr adds; yields 2-bromobutane.
sec-butyl bromide
Same: sec-butyl bromide.
null
null
Hard
1,861
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
1,862
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
1,863
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
1,864
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,865
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
1,866
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
1,867
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,868
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
1,869
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
1,870
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
1,871
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
1,872
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,873
Organic Chemistry
Alkenes
HCl+1-methylcyclohexene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,874
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,875
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
1,876
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
1,877
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
1,878
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
1,879
Organic Chemistry
Alkenes
HBr+1-butene product?
2-bromobutane
HBr adds; yields 2-bromobutane.
sec-butyl bromide
Same: sec-butyl bromide.
null
null
Hard
1,880
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
1,881
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
1,882
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
1,883
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
1,884
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
1,885
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
1,886
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,887
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
1,888
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
1,889
Organic Chemistry
Alkenes
HBr+1-butene product?
2-bromobutane
HBr adds; yields 2-bromobutane.
sec-butyl bromide
Same: sec-butyl bromide.
null
null
Hard
1,890
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,891
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
1,892
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
1,893
Organic Chemistry
Alkenes
HCl+1-butene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,894
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
1,895
Organic Chemistry
Nomenclature
Name CH3CH(OH)CH2CHO?
3-hydroxybutanal
CH3CH(OH)CH2CHO: 3-hydroxybutanal.
beta-hydroxybutyraldehyde
3-hydroxybutanal=beta-hydroxybutyraldehyde.
null
null
Hard
1,896
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
1,897
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
1,898
Organic Chemistry
Alkenes
HBr+2-methylpropene product?
unknown
HBr adds; yields unknown.
unknown
Same: unknown.
null
null
Hard
1,899
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
1,900
Organic Chemistry
Alkenes
HCl+1-methylcyclohexene product?
unknown
HCl adds; yields unknown.
unknown
Same: unknown.
null
null
Hard