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NEET Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ NEET PYQ-Some Basic Concepts Chemistry

  • question_answer
    Assuming fully decomposed, the volume of \[C{{O}_{2}}\] released at STP on heating 9.85 g of \[BaC{{O}_{3}}\] (Atomic mass, Ba = 137) will be:                                                                                                  [AIPMT 2000]

    A)  1.12 L                         

    B)  0.84 L 

    C)  2.24 L

    D)                   4.06 L

    Correct Answer: A

    Solution :

    Table for empirical formula.        
    Element % At. wt. Rel. Number Ratio
    C 40.00 12 \[\frac{40}{12}=3.33\] \[\frac{3.33}{3.33}=1\]
    H 13.33 1 \[\frac{13.13}{1}=13.33\] \[\frac{13.33}{3.33}=4\]
    N 46.67 14 \[\frac{46.67}{16}=3.33\] \[\frac{3.33}{3.33}=1\]
    Hence, empirical formula \[=C{{H}_{4}}N\]


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