Question

Assertion :

We add caustic alkali to bauxite ore during purification of bauxite.

Reason: Bauxite dissolves in caustic alkali and thus impurities can be separated

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

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

Bauxite dissolves in caustic alkali and thus impurities can be separated.

$A{l}_2{O}_3+3C+N_2\to 3AlN+3CO\uparrow$

$Si{O}_2+2C\to Si\uparrow +2CO\uparrow$

$AlN+NaOH\to NaAl{O}_2+N{H}_3$

$NaAl{O}_2+2H_{2}O\to Al(OH{)}_3\downarrow +NaOH$