Question

In the following compounds

The order of acidity is

 

Solution

Correct option is

IV > III > I > II

Nitro group from para position exert electron withdrawing resonance effect, increases acidity of phenol the most. This is followed by meta nitrophenol in which nitro group exert electron withdrawing effect on acidity. CH3― is an electron donating group, decreases acid strength. Hence, the overall order is  

              IV > III > I > II

SIMILAR QUESTIONS

Q1

Which of the following acids has the smallest dissociation constant?

Q2

Among the following compounds, the most acidic is

Q3

 

The bond between carbon atom (1) and carbon atom (2) in compound  

                

                       1      2 

Involves the hybridisation as

Q4

Polarisation of electrons in acrolein may be written as

Q5

The compound which gives the most stable carbonium ion on dehydration is

Q6

The number of sigma and pi-bonds in 1-butene 3-yne are

Q7

Amongst the following, the most basic compound is 

Q8

The hybridisation of carbon atoms in C―C single bond

Q9

 

What is decreasing order of strength of the bases?  

       

Q10

Among the following compounds, the strongest acid is