NEET 2019 Question Paper with Answer Key PDFs in Marathi P6

NEET Questions

• 1.

  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$
     

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• 2.

  Among the given compounds I-III, the correct order of bond dissociation energy of the C-H bond marked with is:

  • I $>$ II $>$ III
    
  • III $>$ II $>$ I
    
  • II $>$ I $>$ III
    
  • I $>$ III $>$ II
    
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• 3.

  Which one of the following compounds does not decolorize bromine water?

  • Phenol
    
  • CH\(_2\)CH\(_2\)
    
  • NH\(_2\)
    
  • Cyclohexane
    
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• 4.

  Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.
  Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repair mechanisms. 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
    
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• 5.

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

  • \(Ph-CH(CH_3)-CH_2-COCH_3\)
    
  • $Ph-C(CH_3)(OH)-CH(CH_3)_2$
    
  • $Ph-CO-CH_2CH_2CH_3$
    
  • $Ph-CH(CH_3)-CH_2-CN$
    
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• 6.

  Name the class of enzyme that usually catalyzes the following reaction: \[ S - G + S^{\prime} \rightarrow S + S^{\prime} - G \] Where \( G \) represents a group other than hydrogen, \( S \) is a substrate, and \( S^{\prime} \) is another substrate.

  • Lyase
  • Transferase
  • Ligase
  • Hydrolase
    
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