Question

Molarity of 0.2 N H₂SO₄ *

(a) 0.2M

(b) 0.4M

(c) 0.6M

(d) 0.1M

Q 2. The quantity of charge required to obtain one mole of Aluminium from Al₂O₃ is........ . *

(a) 1 F

(b) 6 F

(c) 3 F

(d) 2 F

Q 3. Determine the value of the rate constant for the elementary reaction: I₂ (g)+H₂ (g)→2HI (aq)Given that when [I₂] is 0.15 M and [H₂] is 0.2M, the rate of reaction is 0.005 M s⁻¹ at 298 K. *

(a) 1.06 M⁻¹s⁻¹

(b) 2.16 M⁻¹s⁻¹

(c) 3.16 M⁻¹s⁻¹

(d) 0.166 M⁻¹s⁻¹

Q 4. Extent of physisorption of a gas increase with: *

(a) increase in temperature

(b) decrease in temperature

(c) decrease in surface area of adsorbent

(d) decrease in strength of van der Waals forces

Q 5. Common impurities present in bauxite are ____________. *

(a) CuO

(b) ZnO

(c) Fe₂O₃

(d) CaO

Q 6. Cottrell precipitator is used to *

(a) precipitate mud from muddy water.

(b) precipitate carbon particles from smoke.

(c) purify the ordinary drinking water.

(d) precipitate salts in qualitative analysis.

Q 7. At a given temperature, osmotic pressure of a concentrated solution of a substance : *

(a) is higher than that of a dilute solution

(b) is lower than that of a dilute solution

(c) cannot be compared with osmotic pressure of dilute solution

(d) is same as that of a dilute solution

Q 8. Which one of the following does not involve coagulation? *

(a) Peptization

(b) Formation of delta regions

(c) Treatment of drinking water by potash alum

(d) Clotting of blood by the use of ferric chloride

Q 9. Oleum is a mixture of *

a) H₂SO₄ +SO₂

b) H₂SO₄+SO₃

c) H₂S₂O₃+SO₃

d) H₂S₂O₃ +SO₂

Q 10. Which of the following is used to prepare Cl₂ gas at room temperature from concentrated HCl? *

(a) MnO₂

(b) H₂S

(c) K₂MnO₄

(d) Cr₂O₃

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Answer 1

Q1 ka option c means 0.6 Q2 ka option a means 1F Q3 ka option c Q4 ka option b Q5 ka option b Q6 ka option a Q7 ka option c Q8 ka option d Q9 ka option b Q10 ka option c

Answer 2

Explanation:

1)d,2)c,3)d,4)b,5)c,6)b,7)a,8)c,9)b,10a