MCQ
Which one of the following elements has the highest ionisation energy
  • A
    $[Ne]\,3{s^2}\,3{p^1}$
  • B
    $[Ne]\,3{s^2}\,3{p^2}$
  • $[Ne]\,3{s^2}\,3{p^3}$
  • D
    $[Ar]\,3{d^{10}}\,4{s^2}\,4{p^2}$

Answer

Correct option: C.
$[Ne]\,3{s^2}\,3{p^3}$
c
(c) Since ${e^ - }$ is to be removed from exactly half filled $p$-orbital.

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

Which statement is incorrect
Which of the following is an intermediate formed in the reaction shown below ?

$\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C-Cl-N{{H}_{3}}  \\
\end{matrix}$ $\to $ Inter mediate $\to $ product 

What is the order of reaction $A + B \to C$
Observation $[A]$ $[B]$ Rate of reaction
$1$ $0.1$ $0.1$ $2 \times {10^{ - 3}}\,mol\,{L^{ - 1}}{\sec ^{ - 1}}$
$2$ $0.4$ $0.1$ $0.4 \times {10^{ - 2}}\,mol\,{L^{ - 1}}{\sec ^{ - 1}}$
$3$ $0.1$ $0.2$ $1.4 \times {10^{ - 2}}\,mol\,{L^{ - 1}}{\sec ^{ - 1}}$
For hydrogen atom, the orbital/s with lowest energy is/are :
(A) 4 s
(B) $3 p_x$
(C) $3 d_{x^2-y^2}$
(D) $3 d_{z^2}$
(E) $4 p _2$
Choose the correct answer from the options given below :
Conc. ${H_2}S{O_4}$ heated with excess of ${C_2}{H_5}OH$ at ${140\,^o}C$ to form
Image
Among the following which one is a wrong statement?
The bond length between the hybridised carbon atom and other carbon atom is minimum in
Consider the following statements pertaining to fuel cells :-
$(a)$ Hydrogen oxygen fuel cell make use of concentrated $KOH$ solution as  electrolyte and porous graphite impregnated with platinum as electrodes
$(b)$ The efficiency of fuel cell is less then unity due to polarisation at electrodes and  the resistance offered by the electrode and the electrolyte
$(c)$ The electrical work, assuming the cell to be working reversibly may be  represented as $-\Delta G = W_{electrical} = -\Delta H + T \Delta S$
Which of the above statements are correct
In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :