MCQ
Which of the following compound has least $pK_a$ value

  • B

  • C

  • D

Answer

Correct option: A.

a
$p-$ nitro phenol is most acidic least $pK_a$

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

Similar questions

For $A + B \longrightarrow C + D$ ; $\Delta H =  - 20\,kJ/mol$ the activation energy of the forward reaction is $85\, kJ\, mole^{-1}$. The activation energy for backward reaction is.....$KJ/mo{l^{ - 1}}$
Correct $IUPAC$ name of the compound $[Co(NH_3)_4(OH)_2Co(NH_3)_4]^{+4}$ 

$(a)$ tetraamminecobalt $(III)$ dim-hydroxidotetra amminecobalt $(III)$ ion

$(b)$ di $-\mu -$ hydroxidobis(tetraammine)dicobalt $(III)$

$(c)$ Bis $-(\mu -$ hydroxidotetraamminecobalt $(III))$

$(d)$ di $-\mu-$ hydroxidooctaamminedicobalt $(III)$

correct option is

Which of the following is non-electrolytes
The pressure of hydrogen gas is increased from $1\, atm$ to $100\, atm$ keeping the $[{H^ \oplus }]$ constant at $1\, M$. The potential of the hydrogen half-cell at $25\,^oC$ will be .......... $\mathrm{V}$
Which is incorrect match
Butane $-2-$ ol is
In the given reaction:

$\begin{array}{*{20}{c}}
  {O\,\,\,\,} \\ 
  {||\,\,\,\,} \\ 
  {C{H_3} - CH - C - C{H_2} - C{H_3}} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}\xrightarrow{{C{F_3}COOOH}}[X]$ as main product

$[X]$ will be :

Pick out the one which does not belong to the family
For reaction $A \to B$, the rate constant $k_1 = A_1    e^{-Ea_{1} /(RT)}$ and for the reaction $X \to Y$ the rate constant $k_2 = A_2 e^{-Ea_2 /(RT)}$ . If $A_1 = 10^{8}, \,\,A_2 = 10^{10}$ and $E_{a_1} = 600\ cal/mol$, $E_{a_2} = 1800\, cal/mol$, then the temperature at which $k_1 = k_2$ is (Given : $R = 2 \,cal/K-mol$)
Phenol is less acidic than ______________.