Q. Tincal is
A) $Na_{2}CO_{3}.10H_{2}O$
B) $NaNO_{3}$
C) $Na_{2}B_{4}O_{7}.10H_{2}O$
D) $NaCl$
Explanation
(c)
Naturally occurring crude borax is called tincal. Thus, it is chemically $Na_{2}B_{4}O_{7}.10H_{2}O$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.