Question

White crystalline compound borax is
सफेद क्रिस्टलीय यौगिक बोरेक्स है

1)Na2[B4O5 (OH) 4]8H20
2) Sodium peroxoborat
3)Mixture of NaBO2 and B2O3 4)H3BO3​

Answer 1

Answer:

used for mild antiseptic and in the manufacture of heat resistant glass and ceromics

Answer 2

White crystalline compound borax is $Na_{2}[B_{4}O_{5}(OH)_{4}].8H_{2}O$.

Explanation:

• A chemical formula is defined as symbolic representation of a molecule or compound.  The number present as a subscript in a chemical formula depicts the number of atoms of each element present in the compound.

• For example, chemical formula of white crystalline compound borax is $Na_{2}[B_{4}O_{5}(OH)_{4}].8H_{2}O$. Whereas the chemical formula of sodium peroxoborat is $NaBO_{3}·nH_{2}O$.

• Compound with chemical formula $H_{3}BO_{3}$ is known as boric acid.

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