Q. The freezing point of a 0.1 m aqueous solution of NaCl would be: (Kf for water = 1.86°C/m)

NaCl के 0.1 m जलीय घोल का हिमांक बिंदु होगा: (पानी के लिए Kf = 1.86°C/m)

-0.186°C

-0.372°C

0.186°C

0.372°C

Explanation

NaCl dissociates into 2 ions, so $i = 2$ .

Freezing point depression:

Δ T_{f} = i \times K_{f} \times m = 2 \times 1.86 \times 0.1 = {0.372}^{\circ} C

Freezing point = 0 - 0.372 = -0.372°C.

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When 1.8 g of glucose (C₆H₁₂O₆) is dissolved in 100 g of water, the freezing point depression is 0.1°C. If the Kf for water is 1.86°C/m, the molecular weight of glucose is approximately:
जब 1.8 ग्राम ग्लूकोज (C₆H₁₂O₆) को 100 ग्राम पानी में घोला जाता है, तो हिमांक अवनमन 0.1°C होता है। यदि पानी के लिए Kf 1.86°C/m है, तो ग्लूकोज का आणविक भार लगभग है:
The van't Hoff factor (i) for a compound that dissociates into two ions in solution is:
एक यौगिक के लिए वान्ट हॉफ कारक (i) जो घोल में दो आयनों में वियोजित हो जाता है:
For dilute solutions, the relation between molality (m) and mole fraction of solute (X₂) is approximately:
तनु विलयनों के लिए, मोललिटी (m) और विलेय के मोल अंश (X₂) के बीच संबंध लगभग है:
The osmotic pressure of a 0.01 M solution at 27°C is approximately: (R = 0.0821 L·atm/mol·K)
27°C पर 0.01 M घोल का आसमाटिक दबाव लगभग है: (R = 0.0821 L·atm/mol·K)
Which colligative property is most sensitive for determining molecular weights of macromolecules?
मैक्रोमोलेक्यूल्स के आणविक भार निर्धारित करने के लिए कौन सा सहसंयोजक गुण सबसे अधिक संवेदनशील है?

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Q. The freezing point of a 0.1 m aqueous solution of NaCl would be: (Kf for water = 1.86°C/m)

NaCl के 0.1 m जलीय घोल का हिमांक बिंदु होगा: (पानी के लिए Kf = 1.86°C/m)

Explanation

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