MCQ
Which is correct for halogen w.r.t. electron affinity :
- ✓$F > I$
- B$Br > F$
- C$F > Cl$
- D$Br > Cl$
✓
Answer
Correct option: A.
$F > I$
(a) $F > I$
Explanation : The correct order of Electron gain enthalpy of halogen family is, $Cl > F > Br > I$. The reason for this is that the size of the fluorine atom is very small. So, when an electron is added in the fluorine atom it will suffer more electronegativity as all the electrons will be very close to each other and hence the electron gain enthalpy of chlorine is more negative than that of fluorine.
Explanation : The correct order of Electron gain enthalpy of halogen family is, $Cl > F > Br > I$. The reason for this is that the size of the fluorine atom is very small. So, when an electron is added in the fluorine atom it will suffer more electronegativity as all the electrons will be very close to each other and hence the electron gain enthalpy of chlorine is more negative than that of fluorine.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The molecular formula of the china clay (aluminium silicate) was shown in old book as $Al _2 O _3 \cdot 2 SiO _2 \cdot 2 H _2 O$.
The formula is shown in modern book as $Al _2 \cdot Si _2 O _y \cdot( OH )_x$
What are valencies of $x$ and $y$ in the modern formula?
→The formula is shown in modern book as $Al _2 \cdot Si _2 O _y \cdot( OH )_x$
What are valencies of $x$ and $y$ in the modern formula?
Assertion: The reactant which is present in lesser amount parameters the amount of product formed is called limiting reagent.
Reason: Amount of product formed does not depend upon the number of reactants taken.
Reason: Amount of product formed does not depend upon the number of reactants taken.
Valency of aluminium is :
When potassium dichromate (K2Cr2O7) is boiled with conc. HCl, the products of reaction are :
An amphoteric oxide: $Al _2 O _3$ (shows both acidic and basic properties)
→The given picture represents which extraction process of Aluminium?
While preparing dilute sulphuric acid, conc. H2SO4 is added into water because :
Succeeding members of a homologous series differ by ______________ .
The most reactive non-metals comprise Group __________ of the Periodic Table.
The conversion of the concentrated ore into oxide takes place through the calcination and roasting processes.
Which of the following pairs of involved process and the concerning ore are correct?
P. Calcination: Metallic carbonates; Roasting: Hydrated metallic oxides
Q. Calcination: Metallic carbonates, Roasting: Metallic sulphides
R. Calcination: Metallic sulphides; Roasting: Metallic carbonates
Which of the following pairs of involved process and the concerning ore are correct?
P. Calcination: Metallic carbonates; Roasting: Hydrated metallic oxides
Q. Calcination: Metallic carbonates, Roasting: Metallic sulphides
R. Calcination: Metallic sulphides; Roasting: Metallic carbonates