Question

$Na_{2}B_{4}O_{7}.10H_{2}O\overset{\quad\Delta\quad}{\rightarrow}X\overset{\quad\Delta\quad}{\rightarrow}Y + Z$

X, Y and Z in the reaction are

• A. X = $Na_{2}B_{4}O_{7},$ $Y = NaBO_{2},Z = B_{2}O_{3}$
• B. $X = Na_{2}B_{4}O_{7},Y = B_{2}O_{3},Z = H_{3}BO_{3}$
• C. $X = B_{2}O_{3,}Y = NaBO_{2},Z = B(OH)_{3}$
• D. $X = NaBO_{2},Y = B_{2}O_{3},Z = B(OH)_{3}$

Answer 1

Answer: (A)

X = $Na_{2}B_{4}O_{7},$ $Y = NaBO_{2},Z = B_{2}O_{3}$

Answer 2

:

$\underset{(Z)}{+ B_{2}O_{3}}$