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
Arrange the following elements in increasing order of first ionization enthalpy:

$\mathrm{Li}, \mathrm{Be}, \mathrm{B}, \mathrm{C}, \mathrm{N}$

Choose the correct answer from the options given below:

  • ✓
     $\mathrm{Li}<\mathrm{B}<\mathrm{Be}<\mathrm{C}<\mathrm{N}$
  • B
     $\mathrm{Li}<\mathrm{Be}<\mathrm{C}<\mathrm{B}<\mathrm{N}$
  • C
     $\mathrm{Li}<\mathrm{Be}<\mathrm{N}<\mathrm{B}<\mathrm{C}$
  • D
    $\mathrm{Li}<\mathrm{Be}<\mathrm{B}<\mathrm{C}<\mathrm{N}$
✓

Answer

Correct option: A.
 $\mathrm{Li}<\mathrm{B}<\mathrm{Be}<\mathrm{C}<\mathrm{N}$
a
Increasing order of first ionization enthalpy is $\mathrm{Li}<\mathrm{B}<\mathrm{Be}<\mathrm{C}<\mathrm{N}$

Element

First ionization enthalpy

$\left(\Delta_i \mathbf{H} / \mathbf{k J ~ m o l}^{-1}\right)$
 $\mathrm{Li}$ $520$
$\mathrm{Be}$ $899$
$\mathrm{B}$ $801$
$\mathrm{C}$ $1086$
$\mathrm{N}$ $1402$

 

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

$KI$ is oxidised into $I_2$ by using the reagent
→
The shape of ethane is
→
$.........$ does not expand on melting and does not contract on freezing:
→
Borax is known as :
→
In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with $Fe ^{3+}$ due to the formation of-
→
The electronic configuration of an element $'M'$ is given below $M:1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^{10}}4{s^2}4{p^6}4{d^{10}}4{f^2}5{s^2}5{p^6}5{d^{10}}5{f^0}6{s^2}.$ Choose the correct information regarding the element $M$ for its period number, block and group number respectively
→
Which of the following does not react with $PC{l_5}$
→
What is $\Delta n$ for combustion of $ 1 $ mole of benzene, when both the reactants and the products are gas at $298\, K$
→
The shape of ethylene molecule is
→
In the balanced chemical reaction

$IO_3^-+ aI^-+ bH^+ \to cH_2O + dI_2$

$a, b, c, d$ respectively corresponds to

→