Hard Chemistry Chapter 01: Solutions Class 12 Level 4

किसी विलयन की मोलरता शून्य दशमलव पच्चीस है और आयतन आठ सौ मिलीलीटर है। विलेय के मोल कितने होंगे?

A solution has molarity 0.25 M and volume 800 mL. How many moles of solute are present?

Explanation opens after your attempt
Correct Answer

A. 0.2 मोल / 0.2 mol

Step 1

Concept

800 mL = 0.8 L.

Step 2

Why this answer is correct

Moles = molarity × volume = 0.25 × 0.8 = 0.2 mol.

Step 3

Exam Tip

While finding moles from molarity, volume must be in litres. चरण 1: आठ सौ मिलीलीटर = शून्य दशमलव आठ लीटर। चरण 2: मोल = मोलरता × आयतन = शून्य दशमलव पच्चीस × शून्य दशमलव आठ = शून्य दशमलव दो मोल। चरण 3: मोलरता से मोल निकालते समय आयतन लीटर में होना चाहिए।

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