JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Critical Thinking Analytical

  • question_answer
    The salt used for performing 'bead' test in qualitative inorganic analysis is [UPSEAT 2001]

    A) \[{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]

    B) \[FeS{{O}_{4}}.{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O\]

    C) \[Na(N{{H}_{4}})HP{{O}_{4}}.4{{H}_{2}}O\]

    D) \[CaS{{O}_{4}}2{{H}_{2}}O\]

    Correct Answer: C

    Solution :

    \[\underset{\text{Micro cosmic salt}}{\mathop{Na(N{{H}_{4}})HP{{O}_{4}}}}\,\xrightarrow{\Delta }\underset{\text{Sodium meta phosphate (transparent)}}{\mathop{NaP{{O}_{3}}+N{{H}_{3}}+{{H}_{2}}O}}\,\]


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