Download App

7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry7. Alcohol, phenol and ethers1 Mark
MCQ
Which of the following substituents will decrease the acidic strength of phenol?
  • A
    $-NO_2$
  • B
    $-CN$
  • ✓
    $-CH_3$
  • D
    $-CHO$
✓

Answer

Correct option: C.
$-CH_3$
c
$+ I\, \propto \, \frac{1}{acidic \,strength} \, -CH_3$ has $+I$ effect which destabilizes conjugate anion

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 (1 Marks)" from 7. Alcohol, phenol and ethers→7. Alcohol, phenol and ethers — all question types→Chemistry STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

$\mathrm{Fe}(\mathrm{OH})_3$​ sol is:
→
Which of the following pairs of reactants is most effective in forming an enamine ?
→
The increasing order of the crystal field splitting power of some common ligands is
→
Given below are two statements:

Statement $(I)$ : Oxygen being the first member of group $16$ exhibits only $-2$ oxidation state.

Statement $(II)$ : Down the group $16$ stability of $+4$ oxidation state decreases and $+6$ oxidation state increases.

In the light of the above statements, choose the most appropriate answer from the options given below:

→
How many primary amines are possible from the molecular formula $C _4 H _{11} N$ ?
→
A first order reaction has a rate constant of $2.303 \times 10^{-3} \;\mathrm{s}^{-1} .$ The time required for $40 \mathrm{g}$ of this reactant to reduce to $10\; \mathrm{g}$ will be.....$s$

[Given that $\left.\log _{10} 2=0.3010\right]$

→
In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of $sp ^2$ hybridised carbons is $...........$.
→
Which statement is not true for galvanic cell?
→
Consider the reaction between $\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{\ominus}$ and dimethyl sulphate. The leaving group in this reaction is:
→
Which of the following is least reactive towards $SN^{Ar}$
→