Question

Which of the following statements are correct ?

(i) Boron reacts with concentrated $HN{O}_3$ to form nitric oxide and boric acid
(ii) Boron reacts with fused $NaOH$ to form $H_2{O}_2$ and boric acid
(iii) Boron reacts with $Si{O}_2$ to form $Si$ and $B_2{O}_3$

• A. (i), (ii) and (iii)
• B. (i) and (iii)
• C. (ii) and (iii)
• D. (i) and (ii)

Answer 1

The correct option is B (i) and (iii)

(i) Boron reacts with concentrated $HN{O}_3$ to form nitric oxide and boric acid.$B+HN{O}_3+H_{2}O\to H_{3}B{O}_3+NO$

(ii) Boron reacts with fused Sodium Hydroxide to form Sodium Borate and Hydrogen.

$B+6NaOH\to 2N{a}_{3}B{O}_3+3H_2$

(iii) Boron reacts with $Si{O}_2$ to form $Si$ and $B_2{O}_3$.
$4B+3Si{O}_2\to 3Si+2B_2{O}_3$

Hence, option $B$ is correct.