Download App

3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
In which of the following arrangements, the order is not correct according to the property indicated against it
  • A
    Increasing size :  $Al^{3+} < Mg^{2+} < Na^+ < F^-$
  • ✓
    Increasing  $IE_1$ :  $B < C < N < O$
  • C
    Increasing  $EA_1$  :  $I < Br < F < Cl$
  • D
    Increasing metallic radius  :  $Li < Na < K < Rb$
✓

Answer

Correct option: B.
Increasing  $IE_1$ :  $B < C < N < O$
b
In the arrangement of the option $B$, the order is not correct according to the property indicated against it.

The correct order for increasing first ionisation energy is $B \,<\, C \,<\, O \,< \,N$.

The ionisation energy of $N$ is higher than the ionisation energy of $O$. This is because, in case of $N$, the removal of an electron will break stable half-filled electronic configuration of $2 p$ subshell.

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 3. Classification of elements and periodicity in properties→3. Classification of elements and periodicity in properties — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The oxidation state of chromium in the final product formed in the reaction between $KI$ and acidified potassium dichromate solution is:
→
The correct statement(s) for the following addition reactions is(are)

(IMAGE)

$[A]$ ( $M$ and $O)$ and ( $N$ and $P$ ) are two pairs of diastereomers

$[B]$ Bromination proceeds through trans-addition in both the reactions

$[C]$ $O$ and $P$ are identical molecules

$[D]$ (M and $O)$ and ( $N$ and $P)$ are two pairs of enantiomers

→
For the system $A_{(g)} + 2B_{(g)}$ $\rightleftharpoons$ $C_{(g)}$, the equilibrium concentrations are $(A) 0.06$ mole/litre $(B) 0.12$ mole/litre $(C) 0.216$ mole/litre. The ${K_{eq}}$ for the reaction is
→
In Carius method of estimation of halogen, $0.172\, g$ of an organic compound showed presence of $0.08\, g$ of bromine. Which of these is the correct structure of the compound:
→
The internal energy change (in $J$ ) when $90\, g$ of water undergoes complete evaporation at $100^{\circ} C$ is........

(Given: $\Delta H _{\text {vap }}$ for water at $373\, K =41\, kJ / mol$, $\left. R =8.314\, JK ^{-1} mol ^{-1}\right)$

→
The reaction of $HBr$ with the following compound would produce
→
The two electrons in $K $ sub-shell will differ in
→
Match each of the compounds given in Column $I$ with the reaction$(s)$, that they can undergo, given in Column $II$.
→
The conversion of sugar ${C_{12}}{H_{22}}{O_{11}}\, \to \,\,C{O_2}$ is
→
Number of molecules from the following which can exhibit hydrogen bonding is . . . . . . . (nearest integer)
→