Expert Chemistry Chapter 01: Solutions Class 12 Level 5

एक लीटर दो मोलर विलयन में कितना जल मिलाया जाए कि अंतिम मोलरता शून्य दशमलव आठ हो जाए?

How much water should be added to 1 L of 2 M solution to make the final molarity 0.8 M?

Explanation opens after your attempt
Correct Answer

B. 1.5 लीटर / 1.5 L

Step 1

Concept

Initial moles are 2 multiplied by 1 which equals 2 mol.

Step 2

Why this answer is correct

For final molarity 0.8 M the final volume is 2 divided by 0.8 which is 2.5 L.

Step 3

Exam Tip

Since initial volume was 1 L water added is about 1.5 L. चरण 1: प्रारंभिक मोल दो गुणा एक यानी दो हैं। चरण 2: अंतिम मोलरता शून्य दशमलव आठ चाहिए इसलिए अंतिम आयतन दो बटे शून्य दशमलव आठ यानी दो दशमलव पाँच लीटर होगा। चरण 3: प्रारंभिक आयतन एक लीटर था इसलिए मिलाया गया जल लगभग एक दशमलव पाँच लीटर है।

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What is the correct answer to this Chemistry MCQ?

The correct answer is B. 1.5 लीटर / 1.5 L.

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