Question

$N{a}_2{B}_4{O}_7+H_{2}O+HCl\to NaCl+xx\stackrel{\Delta }{\to }y\underset{\Delta }{\overset{Mg}{\to }}z$
the product 'z' in the reaction is

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

$N{a}_2{B}_4{O}_7+2HCl+5H_{2}O\to 2NaCl+4H_{3}B{O}_3\left(x\right)H_{3}B{O}_3\stackrel{\Delta }{\to }{B}_2{O}_3\underset{\Delta }{\overset{Mg}{\to }}2B+MgO\left(x\right)\left(y\right)\left(z\right)AmorphousBoron$