A) \[N{{a}_{2}}C{{O}_{3}}.10{{H}_{2}}O\]
B) \[NaN{{O}_{3}}\]
C) \[NaCl\]
D) \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.10{{H}_{2}}O\]
Correct Answer: D
Solution :
Tincal is also known as borax\[(N{{a}_{2}}{{B}_{4}}{{O}_{7}}.10{{H}_{2}}O)\], a natural mineral of \[Na\] and\[B\].
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