Hard Chemistry Chapter 01: Solutions Class 12 Level 6

०.४ मोलल ग्लूकोज विलयन बनाने के लिए ०.२ मोल ग्लूकोज को कितने ग्राम जल में घोलना चाहिए?

To prepare 0.4 molal glucose solution, 0.2 mol glucose should be dissolved in how many grams of water?

Explanation opens after your attempt
Correct Answer

B. ५०० ग्राम / 500 g

Step 1

Concept

Molality = moles of solute ÷ kg mass of solvent.

Step 2

Why this answer is correct

0.4 = 0.2 ÷ solvent mass. Solvent mass = 0.2 ÷ 0.4 = 0.5 kg = 500 g.

Step 3

Exam Tip

If answer is asked in grams, convert kg to grams at the end. चरण 1: मोललता = विलेय के मोल ÷ विलायक का किलोग्राम द्रव्यमान। चरण 2: ०.४ = ०.२ ÷ विलायक द्रव्यमान। विलायक द्रव्यमान = ०.२ ÷ ०.४ = ०.५ किलोग्राम = ५०० ग्राम। चरण 3: ग्राम में उत्तर चाहिए तो अंत में किलोग्राम को ग्राम में बदलें।

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The correct answer is B. ५०० ग्राम / 500 g.

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