Expert Chemistry Chapter 01: Solutions Class 12 Level 6

0.02 मोल विलेय 500 मिलीलीटर विलयन में है। यदि विलेय का मोलर द्रव्यमान 100 ग्राम प्रति मोल है, तो द्रव्यमान आयतन प्रतिशत कितना होगा?

0.02 mol solute is present in 500 mL solution. If molar mass of solute is 100 g per mol, what is the mass by volume percentage?

Explanation opens after your attempt
Correct Answer

B. 0.4 प्रतिशत / 0.4 percent

Step 1

Concept

Mass of solute = 0.02 × 100 = 2 g.

Step 2

Why this answer is correct

Mass by volume percent = 2 ÷ 500 × 100 = 0.4 percent.

Step 3

Exam Tip

If moles are given, first convert them into gram mass, then apply mass by volume percent. चरण 1: विलेय का द्रव्यमान = ०.०२ × १०० = २ ग्राम। चरण 2: द्रव्यमान आयतन प्रतिशत = २ ÷ ५०० × १०० = ०.४ प्रतिशत। चरण 3: मोल दिए हों तो पहले ग्राम द्रव्यमान निकालें, फिर द्रव्यमान आयतन प्रतिशत लगाएँ।

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