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NEET Sample Paper NEET Sample Test Paper-56

  • question_answer
    Borax is used as a cleansing agent because on dissolving in water, it gives:

    A) Alkaline solution

    B) Acidic solution

    C) Bleaching solution          

    D) Amphoteric solution

    Correct Answer: A

    Solution :

    [a] Alkaline solution Borax \[N{{a}_{2}}\left[ {{B}_{4}}{{O}_{5}}{{(OH)}_{4}} \right]8{{H}_{2}}O\]or Aqueous solution of borax is alkaline due to hydrolysis. Therefore it is used as water softner and cleaning agent. \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}+2{{H}_{2}}O\to \underset{Strong\text{ }alkali}{\mathop{2NaOH}}\,+\underset{weak\text{ }acid}{\mathop{{{H}_{2}}{{B}_{4}}{{O}_{7}}}}\,\]


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