Question

Assetion (A): $Al$ shows passivity with conc. $HN{O}_3$
Reason (R): $Al$ forms a protective layer of $A{l}_2{O}_3$ with conc. $HN{O}_3$

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true

Answer 1

The correct option is A Both Assertion and Reason are true and Reason is the correct explanation of Assertion

A passive layer of aluminium oxide is formed on the aluminium metal by the reaction of Aluminium with concentrated Nitric Acid
$2Al+6\underset{conc.}{HN{O}_3}\to A{l}_2{O}_3+6N{O}_2+3H_{2}O$