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Physical properties of phenol - class-XII

physical properties of phenol

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Questions

Question 1 Multiple Choice (Single Answer)

Unlike phenol, 2,4-dinitrophenol is soluble in sodium carbonate solution in water because ?

  1. presence of two - $NO _2$ groups in the ring makes 2 , 4 - dinitrophenol a stronger acid than phenol.
  2. presence of two - $NO _2$ groups in the ring makes 2 , 4 - dinitrophenol a weaker acid than phenol.
  3. presence of two $-NO _2$ groups make the hydrogen bonding easier, making 2 , 4-dinitrophenol soluble.
  4. nitro group reacts with $Na _2CO _3$ while -$OH$ group does not.
Question 2 Multiple Choice (Single Answer)

Melting point of phenol is :

  1. $53^0C$
  2. $43^0C$
  3. $33^0C$
  4. $23^0C$
Question 3 Multiple Choice (Single Answer)

Which of the following is not true regarding phenol?

  1. Pure phenol is a white crystalline solid
  2. Phenol smell as disinfectant.
  3. It causes immediate white blistering to the skin
  4. None of these
Question 4 Multiple Choice (Single Answer)

Molecular weight of phenol is :

  1. $94.11$
  2. $104.11$
  3. $86.11$
  4. $98$
Question 5 Multiple Choice (Single Answer)

The major product of Raschig process was taken for litmus test.It was observed that it turned:

  1. red litmus blue
  2. blue litmus red
  3. no change in colour
  4. very slight change in colour from red towards blue
Question 6 Multiple Choice (Single Answer)

Phenol is a:

  1. volatile liquid
  2. non-volatile liquid
  3. volatile solid
  4. non-volatile solid
Question 7 Multiple Choice (Single Answer)

Phenol is an organic compound even though it is soluble in water due to the presence of:

  1. ionic bonding
  2. covalent bonding
  3. hydrogen bonding
  4. coordinate bonding
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