Question

Tincal mainly contains:
A) $\text{ NaN}{{\text{O}}_{\text{3 }}}$
B) $\text{ N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}\text{.10}{{\text{H}}_{\text{2}}}\text{O }$
C) $\text{ N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3 }}}$
D) $\text{ N}{{\text{a}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4 }}}$

Answer 1

Hint: Borax is also known as the ‘tincal’. ‘Tincal’ word has come from Sanskrit. It means crude borax, borax which is in impure form. Borax is also known as the tinkle or tincar. The tincal word is related to the Sanskrit word ‘tanaka’.

Complete step by step answer:
Borax has a chemical formula as $\text{ N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{7}}\text{.}\left( \text{n+2} \right){{\text{H}}_{\text{2}}}\text{O }$ .the various names of borax are derived from their water of crystallization. The most commonly obtained borax is octahydrate or decahydrate $\text{ N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}\text{.10}{{\text{H}}_{\text{2}}}\text{O }$.it is a colourless solid which is soluble in water.
Borax is also known as the tincal. the word tincal, tinkle, or tincar, or tinker is referred to as the crude borax .the word was first adopted from the Malay word tingkal.Thus the word tincal is found to be related to the Sanskrit word ‘tanaka’. Tincal is a Sanskrit word for borax. It was found deposited in Tibet in dry lake beds.in $\text{ }{{\text{8}}^{\text{th }}}$ century these deposits were transported to ancient caravans. Tincal is also known as the borate borax.
Thus tincal mainly contains$\text{ N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}\text{.10}{{\text{H}}_{\text{2}}}\text{O }$.

Hence, (B) is the correct option.

Additional information:
Borax is a boron compound. Following are some of the uses of borax:
1) Borax is commonly used in laundry and cleaning products. When treated with hydrochloric acid it forms boric acid. Borax is used as a precursor in several commercial applications. It is also used in the food, chemical, and pharmaceutical industries. The reaction to produces boric acid is as shown below,
$\text{N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}\text{.10}{{\text{H}}_{\text{2}}}\text{O }+\text{ 2HCl }\to \text{ 4B(OH}{{\text{)}}_{\text{3}}}\text{ + 2NaCl + 5}{{\text{H}}_{\text{2}}}\text{O }$
2) Borax also has disinfectant properties. It is used to clean and destroy unwanted pests.
3) Borax is used as a flux material for metallurgical processes.
4) In the biological application of biochemistry borax is used for the production of buffer solutions.
5) Borax is used as the antifungal agent and thus employed to kill fungi and prevent its growth.

Note: Note that hydration of borax is generated as a secondary mineral. Its formula is $\text{ N}{{\text{a}}_{\text{2}}}{{\text{B}}_{\text{4}}}{{\text{O}}_{\text{7}}}\text{.5}{{\text{H}}_{\text{2}}}\text{O }$. This is known as the tincalconite. This name has dome from the Sanskrit word ‘tincal’ for borax and the Greek word ‘konis ‘meaning powder. This dehydrated form of borax is powdery in nature.