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 |
|---|---|---|---|---|---|---|---|---|---|---|
401 | 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 |
402 | 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 |
403 | 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 |
404 | 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 |
405 | 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 |
406 | 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 |
407 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
408 | 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 |
409 | 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 |
410 | 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 |
411 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
412 | 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 |
413 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
414 | 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 |
415 | 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 |
416 | 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 |
417 | 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 |
418 | 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 |
419 | 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 |
420 | 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 |
421 | 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 |
422 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
423 | 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 |
424 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
425 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
426 | 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 |
427 | 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 |
428 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
429 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
430 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
431 | 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 |
432 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
433 | 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 |
434 | 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 |
435 | 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 |
436 | 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 |
437 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
438 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
439 | 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 |
440 | 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 |
441 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
442 | 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 |
443 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
444 | 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 |
445 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
446 | 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 |
447 | 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 |
448 | 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 |
449 | 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 |
450 | 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 |
451 | 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 |
452 | 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 |
453 | 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 |
454 | 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 |
455 | 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 |
456 | 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 |
457 | 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 |
458 | 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 |
459 | 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 |
460 | 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 |
461 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
462 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
463 | 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 |
464 | 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 |
465 | 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 |
466 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
467 | 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 |
468 | 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 |
469 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
470 | 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 |
471 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
472 | 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 |
473 | 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 |
474 | 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 |
475 | 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 |
476 | 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 |
477 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
478 | 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 |
479 | 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 |
480 | 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 |
481 | 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 |
482 | 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 |
483 | 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 |
484 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
485 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
486 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
487 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
488 | 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 |
489 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
490 | 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 |
491 | 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 |
492 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
493 | 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 |
494 | 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 |
495 | 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 |
496 | 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 |
497 | 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 |
498 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
499 | 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 |
500 | 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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