Download App

Alcohols, Phenols, and Ethers — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols, and Ethers1 Mark
MCQ
Unlike phenol, 2,4-dinitrophenol is soluble in sodium carbonate solution in water because?
  • A
    Presence of two -NO2​ groups in the ring makes 2, 4 - dinitrophenol a stronger acid than phenol.
  • B
    Presence of two -NO2​ groups in the ring makes 2, 4 - dinitrophenol a weaker acid than phenol.
  • C
    presence of two -NO2​ groups make the hydrogen bonding easier, making 2, 4-dinitrophenol soluble.
  • D
    Nitro group reacts with Na2​CO3​ while -OH group does not.
✓

Answer

  1. Presence of two -NO2​ groups in the ring makes 2, 4 - dinitrophenol a stronger acid than phenol.

Explanation:

Presence of two electron withdrawing −No2​ groups in the ring makes 2,4-dinitrophenol a stronger acid than phenol. Hence it react with aqueous Na2​CO3​ solution to form sodium salt thus making it soluble in Na2​CO3​.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Alcohols, Phenols, and Ethers→Alcohols, Phenols, and Ethers — all question types→Chemistry STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Molar and ionic conductivities of bivalent electrolyte are 57 and 73 respectively. The molar conductivity of solution will be:
→
Which of the following used as food preservation?
→
In isotonic solutions ____________.
→
Ether is formed when alkyl halide is treated with sodium alkoxide. This method is known as:
→
Three cyclic structures of monosaccharides are given below which of these are anomers.

→
The correct order regarding the electronegativity of hybrid orbitals of carbon is:
→
The time taken to complete the zero order reaction is :
→
Monomer unit of Nylon-66 is:
→
Match the items of column I with appropriate entries of column II.
Column IColumn II
(a) $\frac{\Delta P }{ P ^{\circ}{ }_A}$(i) $\frac{\Delta T _{ b }}{ m }$
(b) Kb(ii) mol fraction of solute
(c) i(iii) $\frac{\Delta T _{ f }}{ m }$
(d) Kf(iv) Ratio of observed molar mass to actual molar mass
 
→
Which hybridisation in $R _2 NH$ ?
→