Surface Chemistry - Online Test
Q1. Which is correct in case of Vander waals adsorption?
Answer : Option B
Explaination / Solution:
Physiadsorption is favoured only at low temperature and high pressure.
Q2. Which adsorption takes place at low temperature?
Answer : Option D
Explaination / Solution:
Physical adsorption is favoured at low temperature because it involves only vanderwall interactions between adsorbate and adsorbent.
Q3. Pt and Pd adsorb large volume of hydrogen under specific conditions. The hydrogen so adsorbed is called
Answer : Option D
Explaination / Solution:
Adsorption of hydrogen by metal like Pt is occlution and hydrogen is known as occluded hydrogen.
Q4. When adsorption of oxalic acid is carried out on activated charcoal, then activated charcoal is known as
Answer : Option C
Explaination / Solution:
Surface on which adsorption occurs is known as adsorbent.
Q5. Which of the following metal solution cannot be prepared by Bredig’s arc method?
Answer : Option D
Explaination / Solution:
Potassium due to very high reactivity, canot be used here.
Q6. The average molecular mass of colloidal can be determined by
Answer : Option B
Explaination / Solution:
Average molecular mass of colloidal solution is determined by Osmotic Pressure measurement.
Q7. Which of the following processes does not involve a catalyst?
Answer : Option A
Explaination / Solution:
Thermite process doesn’t require a catalyst.
Q8. Which type of a property is the Brownian movement of colloidal solution?
Answer : Option C
Explaination / Solution:
Movement is always a mechanical property.
Q9. Hydrophilic colloids are stable due to
Answer : Option C
Explaination / Solution:
This makes the colloid stable.
Q10. Which of the following methods is used for sol destruction?
Answer : Option A
Explaination / Solution:
Electrolyte makes the colloid destroy.
