(A) : Al is more electro positive than Tl.
(R) : Al₂O₃ is more basic than Tl₂O.

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Electronegativity order : B > Tl > In > Ga > Al

Electropositivity order : B < Tl < In < Ga < Al

Electropositivity order ∝ Metallic nature

Al₂O₃ is amphoteric oxide.

→ Tl⁺¹oxidation is more stable. Therefore Tl⁺¹ compounds are more similar to that of I_A group compounds. I_A group oxides and hydroxides are basic in nature and hence Tl(OH) and Tl₂O are also basic in nature.

Hence basic strength order : Tl₂O > Al₂O₃

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th

🔥 Start Your JEE/NEET Prep at Just ₹1999 / month - Limited Offer! Check Now!

Get Expert Academic Guidance – Connect with a Counselor Today!