NEET 2018 Question Paper with Answer Key PDFs in English XX

NEET Questions

• 1.

  Given below are two statements:
  Statement I: The primary source of energy in an ecosystem is solar energy. 
  Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
  In 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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• 2.

  The correct order of decreasing acidity of the following aliphatic acids is:

  • $CH_{3}COOH$ $>$ (CH_{3})_{2}CHCOOH $>$$ (CH_{3})_{3}CCOOH$ $>$ HCOOH
     

  • $CH_3COOH > (CH_3)_2CHCOOH > (CH_3)_3CCOOH$

  • $HCOOH > (CH_3)_3CCOOH > (CH_3)_2CHCOOH > CH_3COOH$

  • $(CH_3)_3CCOOH > (CH_3)_2CHCOOH > CH_3COOH > HCOOH$

  View Solution

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• 3.

  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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• 4.

  Sugar ‘X’:
  A. is found in honey.
  B. is a keto sugar.
  C. exists in $\alpha$ and $\beta$ anomeric forms.
  D. is laevorotatory.
  ‘X’ is:

  • D-Fructose
    
  • Sucrose
    
  • Maltose
    
  • D-Glucose
    
  View Solution

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• 5.

  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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• 6.

  Identify the correct orders against the property mentioned:
  A. H$_2$O $>$ NH$_3$ $>$ CHCl$_3$ - dipole moment
  B. XeF$_4$ $>$ XeO$_3$ $>$ XeF$_2$ - number of lone pairs on central atom 
  C. O–H $>$ C–H $>$ N–O - bond length 
  D. N$_2$>O$_2$>H$_2$ - bond enthalpy 
  Choose the correct answer from the options given below:

  • B, D only
    
  • A, C only
    
  • B, C only
    
  • A, D only
    
  View Solution