Solution | Chemistry Past Years Papers MCQs | mosaicbro.com

Solution | Chemistry Past Years Papers MCQs

7 of 30 questions (Page 2 of 5)

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8 0.1 molar solute dissolved in 100g of solvent will be:
Correct Answer: B
Explanation: 0.1 mol / 0.1 kg solvent = 1.0 m.
9 Raoult's law is represented by:
Correct Answer: D
Explanation: All forms represent Raoult's law for ideal solutions.
10 The amount of NaOH required to prepare 250 cm³ of 1M solution in grams is:
Correct Answer: A
Explanation: Moles = 1M × 0.25 dm³ = 0.25 mol ⇒ mass = 0.25 × 40 = 10g.
11 10g NaOH dissolved per 250 cm³ of solution has molarity:
Correct Answer: B
Explanation: Moles NaOH = 10/40 = 0.25 ⇒ M = 0.25/0.25 = 1.0 M.
12 The azeotropic mixture showing positive deviation can be distilled at:
Correct Answer: B
Explanation: Positive deviation ⇒ lower boiling azeotrope.
13 The hydration energy of Br⁻ ion is ______ than F⁻ ion:
Correct Answer: B
Explanation: F⁻ has higher hydration energy due to smaller size.
14 The boiling point elevation depends upon:
Correct Answer: A
Explanation: ΔTb = Kb × m (Kb is solvent-specific).
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