​The correct orders among the following are: Atomic radius : B < Al < Ga < In < Tl Electronegativity : Al < Ga < In < Tl < B

Question

The correct orders among the following are:

Atomic radius : \(\mathrm{B}<\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}\)

Electronegativity : \(\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}<\mathrm{B}\)

Density : \(\mathrm{Tl}<\mathrm{In}<\mathrm{Ga}<\mathrm{Al}<\mathrm{B}\)

1st Ionisation Energy : \(\mathrm{In}<\mathrm{Al}<\mathrm{Ga}<\mathrm{Tl}<\mathrm{B}\)

Choose the correct answer from the options given below : 

(1) B and D Only 

(2) A and C Only 

(3) C and D Only 

(4) A and B Only

Answer 1

Correct option is: (1) B and D Only 

	B	Al	Ga	In	Tl
Atomic radius (pm)	88	143	135	167	170
Electronegativity	1	1.5	1.6	1.7	1.8
Density \((g/cm^3)\)	2.35	2.7	5.9	7.31	11.85
Ionisation Energy (kJ/mol)	801	577	579	558	589

Radius Order        \(\mathrm{T} \ell>\mathrm{In}>\mathrm{A} \ell>\mathrm{Ga}>\mathrm{B}\)

En Order                \( \mathrm{B}>\mathrm{T} \ell>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}\)

Density Order        \(\mathrm{T} \ell>\mathrm{In}>\mathrm{Ga}>\mathrm{A} \ell>\mathrm{B}\)

\(IE_1\) Order               \(\mathrm{B}>\mathrm{T} \ell>\mathrm{Ga}>\mathrm{A} \ell>\mathrm{In}\)