ল্যাবরেটরিতে দুইটি ভিন্ন রিয়েজেন্ট বোতলে HCl দ্রবণ রক্ষিত আছে। একটির ঘনমাত্রা 0.4M এবং অপরটির ঘনমাত্রা 0.1M। 0.25 M ঘনমাত্রার দ্রবণ প্রস্তুত করার জন্য নমুনা দ্রবণ দুইটি আয়তনের কী অনুপাতে মেশাতে হবে?
A. 02:01
B. 01:02
C. 02:03
D. 01:01
সঠিক উত্তরঃ
D.
01:01
Explanation: 0.4×V1+0.1×V2=0.25×(V1+V2)⇒0.15V1=0.15 V2⇒V1=V2⇒V1:V2=1∶ 1
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