UNIT 10: Surface Chemistry - Online Test
Q1. The phenomenon observed when a beam of light is passed through a colloidal solution is
Answer : Option D
Explaination / Solution:
Tyndall effect-scattering of light
Q2. In
an electrical field, the particles of a colloidal system move towards cathode.
The coagulation of the same sol is studied using K2 SO4
(i), Na3 PO4 (ii),K4 [Fe(CN)6 ]
(iii) and NaCl (iv) Their coagulating power should be
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?
Answer : Option D
Explaination / Solution:
pyroxylin(nitro cellulose)
Q4. Which one of the following is an example for homogeneous catalysis?
Answer : Option D
Explaination / Solution:
Both reactant and catalyst are in same phase. i.e(l)
Q5.
Match the following
A) V2O5 i) High density polyethylene
B) Ziegler – Natta ii) PAN
C) Peroxide iii) NH3
Answer : Option A
Explaination / Solution:
No Explaination.
Q6.
The coagulation values in millimoles per litre of the electrolytes used
for the coagulation of As2S3 are given below
(I) (NaCl)=52 (II) ((BaCl2 )=0.69 (III) (MgSO4
)=0.22
Answer : Option A
Explaination / Solution:
coagulating power α = 1/ coagulation value
Q7. Adsorption of a gas on solid metal surface is spontaneous and exothermic, then
Answer : Option D
Explaination / Solution:
∆S is –ve
Q8. If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. On which of the following properties does the coagulating power of an ion depend ?
Answer : Option A
Explaination / Solution:
No Explaination.
Q10.
Match the following
A) Pure nitrogen i) Chlorine
B) Haber process ii) Sulphuric acid
C) Contact process iii) Ammonia
D) Deacons Process iv) sodium azide (or) Barium azide
Answer : Option D
Explaination / Solution:
No Explaination.
