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K D Ambani Vidyamandir, Reliance Greens Session 2019-2020

This document is a chemistry worksheet on the topic of surface chemistry. It contains 6 questions asking about concepts like ZSM-5, adsorption vs absorption, zeta potential, lyophillic vs lyophobic colloids, Tyndall effect, Brownian movement, applications of colloids, catalytic activity and selectivity, and shape selective catalysts. The student is asked to define terms, explain phenomena, and give examples for each question.

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Kashyap Patel
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98 views1 page

K D Ambani Vidyamandir, Reliance Greens Session 2019-2020

This document is a chemistry worksheet on the topic of surface chemistry. It contains 6 questions asking about concepts like ZSM-5, adsorption vs absorption, zeta potential, lyophillic vs lyophobic colloids, Tyndall effect, Brownian movement, applications of colloids, catalytic activity and selectivity, and shape selective catalysts. The student is asked to define terms, explain phenomena, and give examples for each question.

Uploaded by

Kashyap Patel
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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K D Ambani Vidyamandir, Reliance Greens

Session 2019-2020
Chemistry – Worksheet
Topic: Surface Chemistry
Name: _______________________ Date: ____________
Class: _____ Sec: ________ Roll No.: __________

Q.1 (a) What is ZSM-5? give its use.


(b) Give differences between
(i) Adsorption and absorption. (ii) Physiosorption and chemisorption.
Q.2 Explain the terms
(i) Zeta potential (ii) Helmoltz electrical double layer
(iii) Coagulation (iv) Peptization
Q.3 Account for the following:
(i) Lyophillic colloids are more stable than lyophobic colloids.
(ii) Delta formation occurs at the river beds.
(iii) Alum or ferric chloride is added to stop bleeding.
(iV) Sky appears blue in colour.
(v) Alum is used in water purification.
(vi) Mention the principle of dialysis.
Q.4 (a) What is Tyndall effect? Mention the condition for Tyndall effect to occur. Give two
application of Tyndall effect.
(b) Mention the disperse phase and dispersion medium in

(i) Milk (ii) butter (iii)cheese (iv)Fog (v)mist (vi) froth


Q.5 (a) What is Brownian movement? Mention the significance of Brownian movement.
(b) Explain the terms
(i) Kaft temperature
(i) CMC(critical micelle concentration)
Q.6 (a) List four applications of colloids.
(b) Explain activity and selectivity of a catalyst with suitable examples.
(c) What are shape selective catalysts? Give one example.

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