First slide

13th group or boron group

Question

(X) and (Y) are elements belonging to 13^th group. The periodic property of (X) is less than (Y). Identify correct combination among the following

Moderate

A

Ga and In -----Melting point
B

B and Al ------Density at 298 K
C

Tl and In ------Boiling point
D

Al and Tl ------- $E_{M^{+ 3} | M}^{°}$

Solution

Melting point ---- Ga < In < Tl <Al < B
Density at 298 K---- B < Al < Ga < ln < Tl
Boiling point ------ Tl < In < Ga < Al < B
$E_{M^{+ 3} | M}^{°}$ -------- Al < Ga < ln < Tl

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