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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Self Evaluation Test - Some Basic Concepts of Chemistry

  • question_answer
    10 mL of 2 M NaOH solution is added to 200 mL of 0.5 M of NaOH solution. What is the final concentration?

    A) 0.57 M  

    B) 5.7 M

    C)  11.4M             

    D) 1.14M

    Correct Answer: A

    Solution :

    [a] From molarity equation \[{{M}_{1}}{{V}_{1}}+{{M}_{2}}{{V}_{2}}=M{{V}_{(total)}}\] \[2\times \frac{10}{1000}+0.5\times \frac{200}{1000}=M\times \frac{210}{1000}\] \[120=M\times 210\] \[M=\frac{120}{210}=0.57M\]


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