Expert Chemistry Chapter 01: Solutions Class 12 Level 4

एक मोलर विलयन के एक सौ मिलीलीटर और तीन मोलर विलयन के दो सौ मिलीलीटर को मिलाया गया। अंतिम आयतन जोड़ने योग्य मानें। मिश्रित विलयन की मोलरता क्या होगी?

100 mL of 1 M solution and 200 mL of 3 M solution are mixed. Assume volumes are additive. What is the molarity of the mixed solution?

Explanation opens after your attempt
Correct Answer

A. 2.33 मोलर / 2.33 M

Step 1

Concept

First find moles: 1 × 0.1 = 0.1 and 3 × 0.2 = 0.6.

Step 2

Why this answer is correct

Total moles = 0.7 and total volume = 0.3 L, so molarity = 0.7/0.3 = 2.33 M.

Step 3

Exam Tip

In mixing, add moles first; do not directly average molarity. चरण 1: पहले मोल निकालें: 1 × 0.1 = 0.1 और 3 × 0.2 = 0.6। चरण 2: कुल मोल 0.7 और कुल आयतन 0.3 लीटर है, इसलिए मोलरता 0.7/0.3 = 2.33 मोलर। चरण 3: मिश्रण में मोल जोड़ें, मोलरता को सीधे औसत न करें।

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