First slide

Atomic and physical properties

Question

Which of the following statement is incorrect

Easy

A

Boron on heating in air forms $B_{2} O_{3} and BN$
B

Aluminium is highly reactive towards concentrated nitric acid
C

Boron trioxide is acidic in nature.
D

Thallium monoxide is basic in nature

Solution

Aluminium renders passive towards conc.nitric acid;

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