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NEET Chemistry The s-Block Elements / s-ब्लॉक के तत्व Sample Paper Self Evaluation Test - The s-Blcok Elements

  • question_answer
    \[ZnC{{l}_{2}}+NaHC{{O}_{3}}\xrightarrow{Heat}(A)\xrightarrow{Heat}\] \[(B)+(C){{H}_{2}}O(B)+NaOH\to (D)\] Identify the compound (D) present in the solution.              

    A) \[ZnC{{O}_{3}}\]        

    B) \[Zn{{(OH)}_{2}}\]

    C) \[ZnO\]             

    D) \[N{{a}_{2}}Zn{{O}_{2}}\]

    Correct Answer: D

    Solution :

    [d] \[ZnC{{l}_{2}}+2NaHC{{O}_{3}}\xrightarrow{\Delta }\] \[Zn\underset{[a]}{\mathop{{{\left( HC{{O}_{3}} \right)}_{2}}}}\,+2NaCl\] \[Zn\underset{[a]}{\mathop{{{\left( HC{{O}_{3}} \right)}_{2}}}}\,\xrightarrow{\Delta }\] \[\underset{[b]}{\mathop{ZnC{{O}_{3}}}}\,+{{H}_{2}}O+\underset{[c]}{\mathop{C{{O}_{2}}}}\,\uparrow \] \[\underset{[b]}{\mathop{ZnC{{O}_{3}}}}\,+2NaOH\to N{{a}_{2}}Zn{{O}_{2}}+2{{H}_{2}}O\]


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