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Alcohols, Pheno...

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  • Question 1
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    Which reagent can best distinguishes 3-pentanol and 3-methyl-3-pentanol?

  • Question 2
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    An organic compound X (C5H12O) gives effervescence with NaH. X on treatment with acidic CrO3 solution turns solution to blue-green forming C5H10O2. Also X can be resolved into enantiomers. The correct statement regarding X is

  • Question 3
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    An organic compound C4H10O (X) on reaction with I2/red-P give s C4H9I which on further reaction with AgNO2 gives C4H9NO2 (Y). Y on treatment with HNO2 forms a blue solution which turns to red on making solution slightly alkaline. The possible identity of X is

  • Question 4
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    An organic compound X (C7H16O) on treatm ent with concentrated HCI solution forms immediate turbidity even in the absence of ZnCl2. Also, X is resolvable into enantiomers. The correct statement concerning X is

  • Question 5
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    Which reagent given below does not produce any visible change when added to ethylene glycol?

  • Question 6
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    Which of the following is least likely to form turbidity with HCI in the presence of ZnCI2 at room temperature?

  • Question 7
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    The correct statement regarding 3-ethyl-3-hexanol is

  • Question 8
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    An alcohol has molecular formula C6H12O X and it gives immediate turbidity with cold, concentrated HCI even in the absence of ZnCI2. X can also be obtained by treatment of an ether with excess of CH3MgBr followed by acid hydrolysis. Hence, the correct statement regarding X is

  • Question 9
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    Benzenediazonium chloride on reaction with phenol in weakly basic medium gives

  • Question 10
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    Phenol reacts with bromine in CS2 at low temperature to give

  • Question 11
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    Phenol on reduction with H2 in the presence of Ni catalyst gives

  • Question 12
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    Dehydration of alcohol is an example of

  • Question 13
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    Passage

    An organic compound X (C9H12O) gives the following reactions :
    i. Na - Slow gas bubble formation
    ii. Acetic anhydride - Pleasent smelling liquid
    iii. CrO3-H2SO4 - Blue-green solution
    iv. Hot KMnO4 - Benzoic acid
    v. Br2-CCI4 - No decolouration
    vi. I2 + NaOH - Yellow solid is formed
    vii. X rotates the plane polarised light

    Q. The structure of X is

     

  • Question 14
    4 / -1

    An organic compound X (C9H12O) gives the following reactions :
    i. Na - Slow gas bubble formation
    ii. Acetic anhydride - Pleasent smelling liquid
    iii. CrO3-H2SO4 - Blue-green solution
    iv. Hot KMnO4 - Benzoic acid
    v. Br2-CCI4 - No decolouration
    vi. I2 + NaOH - Yellow solid is formed
    vii. X rotates the plane polarised light

    Q. 

    If X is treated with HCI in the presence of ZnCI2, the major product would be

  • Question 15
    4 / -1

    An organic compound X (C9H12O) gives the following reactions :
    i. Na - Slow gas bubble formation
    ii. Acetic anhydride - Pleasent smelling liquid
    iii. CrO3-H2SO4 - Blue-green solution
    iv. Hot KMnO4 - Benzoic acid
    v. Br2-CCI4 - No decolouration
    vi. I2 + NaOH - Yellow solid is formed
    vii. X rotates the plane polarised light

    Q. 

    An isomer of X, Y was also found to be optically active. It showed the same reactions as X except (vi). Hence, Y is

  • Question 16
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    The compound obtained by the reaction of ethene with diborane followed by hydrolysis with alkaline H2O2 is

  • Question 17
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    Which of the following is formed when phenol is exposed to air?

  • Question 18
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    Which of the following is formed when glycerol is heated with oxalic acid at 503K?

  • Question 19
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    The alcohol which does not react with Lucas reagent is

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