BCECE Question Paper 2025 (Available): Download Question Paper with Solution PDF

NEET Questions

• 1.

  The major product of the following reaction is:
  $Ph-C(=O)-CH_2CH_2-CN$
  (i) $CH_{3}MgBr (excess) (ii) H_{+}H_{2}O$

  • \(Ph-CH(CH_3)-CH_2-COCH_3\)
    
  • $Ph-C(CH_3)(OH)-CH(CH_3)_2$
    
  • $Ph-CO-CH_2CH_2CH_3$
    
  • $Ph-CH(CH_3)-CH_2-CN$
    
  View Solution

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• 2.

  Given below are two statements:
  Statement I: Benzendiazonium salt is prepared by the reaction of aniline with nitrous acid at 273-278 K. It decomposes easily in the dry state.
  Statement II: Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzendiazonium salt with KI.
  In the light of the above statements, choose the most appropriate answer from the options given below:

  • Both Statement I and Statement II are incorrect.
    
  • Statement I is correct but Statement II is incorrect.
    
  • Statement I is incorrect but Statement II is correct.
    
  • Both Statement I and Statement II are correct.
    
  View Solution

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• 3.

  Given below are two statements:
  Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.
  Statement II: As bond order increases, the bond length increases.
  In the light of the above statements, choose the most appropriate answer from the options given below:

  • Both Statement I and Statement II are false
    
  • Statement I is true but Statement II is false
    
  • Statement I is false but Statement II is true
    
  • Both Statement I and Statement II are true
    
  View Solution

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• 4.

  Which one of the following compounds can exist as cis-trans isomers?

  • 2-Methylhex-2-ene
    
  • 1,1-Dimethylcyclopropane
    
  • 1,2-Dimethylcyclohexane
    
  • Pent-1-ene
    
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• 5.

  Identify the suitable reagent for the following conversion: $Ph-C(=O)-OCH_3$ $\longrightarrow$ $Ph-CHO$

  • (i) $AlH(iBu)_{2}$ (ii) $H_{2}O$
     

  • (i) $NaBH_{4}$, (ii) $H^{+}H_{2}O$
     

  • $H_{2}$ $Pd-BaSO_{4}$
     

  • (i) $LiAlH_{4}$, (ii) $H^{+}$$H_{2}O$
     

  View Solution

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• 6.

  The correct order of decreasing basic strength of the given amines is:

  • N-ethylmethanamine $>$ ethanamine $>$ benzenamine $>$ N-methylaniline
    
  • N-ethylmethanamine $>$ ethanamine $>$ N-methylaniline $>$ benzenamine
    
  • N-methylaniline $>$ ethanamine $>$ benzenamine $>$ N-ethylmethanamine
    
  • N-methylaniline $>$ N-ethylmethanamine $>$ benzenamine $>$ ethanamine
    
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