Expert Chemistry Chapter 01: Solutions Class 12 Level 4

एक विलयन का घनत्व एक दशमलव दो पाँच ग्राम प्रति मिलीलीटर है। दो सौ ग्राम विलयन में पच्चीस ग्राम विलेय है। द्रव्यमान-आयतन प्रतिशत लगभग कितना होगा?

A solution has density 1.25 g per mL. A 200 g solution contains 25 g solute. What is the approximate mass-volume percentage?

Explanation opens after your attempt
Correct Answer

A. 15.625 प्रतिशत / 15.625 percent

Step 1

Concept

Volume of solution = mass/density = 200/1.25 = 160 mL.

Step 2

Why this answer is correct

Mass-volume percentage = 25/160 × 100 = 15.625 percent.

Step 3

Exam Tip

Find the correct volume first, then apply the percentage relation. चरण 1: विलयन का आयतन = द्रव्यमान/घनत्व = 200/1.25 = 160 मिलीलीटर। चरण 2: द्रव्यमान-आयतन प्रतिशत = 25/160 × 100 = 15.625 प्रतिशत। चरण 3: पहले सही आयतन निकालें, फिर प्रतिशत लगाएं।

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The correct answer is A. 15.625 प्रतिशत / 15.625 percent.

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