Surface-Chemistry-Quiz-10

Surface Chemistry Quiz-10

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry..

Q1. An example of solid-solid system is :

•  Smoke
•  Cake
•  Synthetic gems
•  Pumice stone

Solution
Precious stones are solid in solid sol.

Q2.Which of the following is adsorbed greatly by activated charcoal?

•  
•  
•  
•  Water vapours

Solution
Activated charcoal has great affinity for water vapour as they easily form hydrogen bond among themselves.

Q3.  Colloidal solution of arsenious sulphide can be prepared by :

•   Electrodispersion method
•  Peptization
•  Double decomposition
•  hydrolysis

Solution

Q4. Blood may be purified by

•  Dialysis
•  Electro-osmosis
•  Coagulation
•  Filtration

Solution
Blood is purified by dialysis method

Q5.Fog is a colloidal solution of

•  Liquid particles dispersed in gas
•  Gaseous particles dispersed in a liquid
•  Solid particles dispersed in liquid
•  Solid particles dispersed in gas

Solution
 Fog is a colloidal solution in which water (liquid, dispersed phase) is dispersed in air (gas, dispersion medium)

Q6. A catalyst alter the rate of reaction by

•  Altering enthalpy
•  Altering internal energy
• Altering energy of activation
•  All of the above

Solution
Altering energy of activation

Q7.The movement of sol particles under an applied electric field is called :

•  Electrodeposition
•  Electrodialysis
•  Electroosmosis
•  Electrophoresis

Solution
Sol particles carry charge and thus, move towards opposite electrodes under the influence of electric field and the phenomenon is known as cataphoresis or electrophoresis.

Q8.Which forms micelles in aqueous solution above certain concentration?

•  Glucose
•  Dodecyl trimethyl ammonium chloride
•  Urea
•  Pyridinium chloride

Solution
Dodecyl trimethyl ammonium chlorideon dissolution formsions. The former possesses hydrophilic (−N) and hydrophobic parts.

Q9.The amount of gas adsorbed physically on charcoal increases with :

•  Temperature and pressure
•  Temperature and decreases with pressure
•  Pressure and decreases with temperature
•  None of the above

Solution
Adsorption of gases increases with pressure, decreases with temperature.

Q10. Which forms multi molecular layers during adsorption?

•  Physical adsorption
•  vanderWaals’ adsorption
•  Freundlich adsorption
• All of the above

Solution
All are same terms since Freundlich isotherm is based on physical adsorption.