MCQ
The electrons, identified by quantum by numbers $n$ and $l,$ $(i)\, n = 4, l = 1$ $(ii)\, n = 4, l= 0$ $(iii)\, n = 3, l= 2$ $(iv)\,n = 3, l = 1$ can be placed in order of increasing energy, from the lowest to highest, as
  • $(iv) < (ii) < (iii) < (i)$
  • B
    $(ii) < (iv) < (i) < (iii)$
  • C
    $(i) < (iii) < (ii) < (iv)$
  • D
    $(iii) < (i) < (iv) < (ii)$

Answer

Correct option: A.
$(iv) < (ii) < (iii) < (i)$
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

Which of the following reacts with nitrogen when heated in air:
A severe shortage of what in body fluids, may cause a potentially fatal condition known as hypokalemia?
Assign $A, B, C, D$ from given type of reaction.

${P_4} + 6Cl_2\xrightarrow{\Delta }PC{l_3}$

The element $Z = 117$ should
The $\ce{C−C}$ bond length of the following molecules is in the order :
Ethyl acetoacetate shows, which type of isomerism
Which of the following catalyst is used in the polymerisation of $CH \equiv CH$ to ${C_6}{H_6}$
Match list $-I$ with list $-II$ and then select the correct answer from the codes given below that list

                                  List $-I$

$(A){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_6} + CO + HCl\,\xrightarrow{{AlC{l_3}}}\,{C_6}{H_5}CHO$

$(B){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_5} + C{H_3}$ $\xrightarrow{{Cr{O_2}C{l_2}}}\,{C_6}{H_5}CHO$

$(C){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_5}C{H_2}Br\, + \,C{H_3}Br$ $\xrightarrow{{Na/ether}}\,{C_6}{H_5}C{H_2}C{H_3}$

$(D){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_6}\, + \,{(C{H_3})_2}C = C{H_2}$ $\xrightarrow{{{H_2}S{O_4}}}\,{C_6}{H_5}C{(C{H_3})_3}$

                                 List $-II$
$(a)$   Friedel-Crafts reaction
$(b)$   Wurtz-Fitting reaction
$(c)$   Gattermann-Koch Aldehyde synthesis
$(d)$   Etard’s reaction

Choose the correct order for given property
$(M.P. \to  Melting Point ;    S \to Solubility)$
The essential condition for the feasibility of a reaction is that