Each oxy-acid contains at least one X—OH unit (X is non-metal). The H-atom of X—OH unit is ionisable and the number of —OH groups directly attach to non-metal decides the basicity of oxy-acid.

Question

Each oxy-acid contains at least one X—OH unit (X is non-metal). The H-atom of 
X—OH unit is ionisable and the number of —OH groups directly attach to non-metal
decides the basicity of oxy-acid.

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Borax is sodium tetraborate decahydrate (Na2B4O7.10H2O). Step 2: Adding a mineral acid (such as HCl or H2SO4) to an aqueous solution of borax results in an acid-base neutralization reaction: Na2B4O7 + 2HCl + 5H2O -> 2NaCl + 4H3BO3. Step 3: The product H3BO3 is orthoboric acid (also simply called boric acid), which precipitates out of the solution, matching option (b).

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