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Aldehydes Ketones and Carboxylic Acids question

2025 · 4 Apr · Shift 1 · Q15
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Aldehydes Ketones and Carboxylic Acids question

2025 · 4 Apr · Shift 1 · Q15

JEE MainChemistryAldehydes Ketones and Carboxylic AcidsMCQ+4 / −1
An organic compound (X)(\mathrm{X})(X) with molecular formula C3H6O\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}C3​H6​O is not readily oxidised. On reduction it gives C3H8O(Y)\mathrm{C}_3 \mathrm{H}_8 \mathrm{O}(\mathrm{Y})C3​H8​O(Y) which reacts with HBr to give a bromide (Z)(\mathrm{Z})(Z) which is converted to Grignard reagent. This Grignard reagent on reaction with (X)(\mathrm{X})(X) followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds (X),(Y)(\mathrm{X}),(\mathrm{Y})(X),(Y) and (Z)(\mathrm{Z})(Z) respectively are:
  1. A
    CH3CH2CHO,CH3CH2CH2OH,CH3CH2CH2Br\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br}CH3​CH2​CHO,CH3​CH2​CH2​OH,CH3​CH2​CH2​Br
  2. B
    CH3COCH3,CH3CH(OH)CH3,CH3CH(Br)CH3\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3CH3​COCH3​,CH3​CH(OH)CH3​,CH3​CH(Br)CH3​
  3. C
    CH3COCH3,CH3CH2CH2OH,CH3CH(Br)CH3\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3CH3​COCH3​,CH3​CH2​CH2​OH,CH3​CH(Br)CH3​
  4. D
    CH3CH2CHO,CH3CH=CH2,CH3CH(Br)CH3\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3CH3​CH2​CHO,CH3​CH=CH2​,CH3​CH(Br)CH3​
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