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 |
|---|---|---|---|---|---|---|---|---|---|---|
601 | 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 |
602 | 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 |
603 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
604 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
605 | 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 |
606 | 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 |
607 | 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 |
608 | 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 |
609 | 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 |
610 | 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 |
611 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
612 | 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 |
613 | 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 |
614 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
615 | 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 |
616 | 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 |
617 | 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 |
618 | 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 |
619 | 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 |
620 | 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 |
621 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
622 | 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 |
623 | 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 |
624 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
625 | 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 |
626 | 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 |
627 | 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 |
628 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
629 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
630 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
631 | 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 |
632 | 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 |
633 | 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 |
634 | 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 |
635 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
636 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
637 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
638 | 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 |
639 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
640 | 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 |
641 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
642 | 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 |
643 | 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 |
644 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
645 | 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 |
646 | 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 |
647 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
648 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
649 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
650 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
651 | 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 |
652 | 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 |
653 | 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 |
654 | 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 |
655 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
656 | 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 |
657 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
658 | 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 |
659 | 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 |
660 | 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 |
661 | 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 |
662 | 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 |
663 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
664 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
665 | 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 |
666 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
667 | 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 |
668 | 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 |
669 | 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 |
670 | 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 |
671 | 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 |
672 | 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 |
673 | 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 |
674 | 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 |
675 | 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 |
676 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
677 | 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 |
678 | 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 |
679 | 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 |
680 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
681 | 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 |
682 | 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 |
683 | 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 |
684 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
685 | 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 |
686 | 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 |
687 | 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 |
688 | 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 |
689 | 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 |
690 | 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 |
691 | 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 |
692 | 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 |
693 | 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 |
694 | 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 |
695 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
696 | 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 |
697 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
698 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
699 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
700 | 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 |
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