Recent questions and answers in Surface Chemistry

What are the characteristics of Catalysts?

answered Jun 22, 2017 by pady_1

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Explain the Types of emulsions

answered Jun 22, 2017 by pady_1

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what is (i) Brownian movement (ii) Tyndall effect

answered Jun 22, 2017 by pady_1

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what is (i) Brownian movement (ii) Tyndall effect

answered Jun 22, 2017 by pady_1

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Explain the methods of the Purification of colloids

answered Jun 22, 2017 by pady_1

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Explain two methods of Purification of colloids

answered Jun 22, 2017 by pady_1

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Give the Classification of colloids on the basis of types of particles of the d

answered Jun 22, 2017 by pady_1

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What is Colloids , Dispersed Phase and Dispersion Medium

asked Jun 22, 2017 by pady_1

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Define (i) Catalyst (ii) Promoters (iii) Inhibitors

answered Jun 22, 2017 by pady_1

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List the Applications of Adsorption

answered Jun 22, 2017 by pady_1

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List the Applications of Adsorption

asked Jun 22, 2017 by pady_1

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Give the Factors affecting adsorption of gases on solids.

answered Jun 22, 2017 by pady_1

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Give the Factors affecting adsorption of gases on solids.

answered Jun 22, 2017 by pady_1

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What is heat of adsorption and explain its types.

answered Jun 22, 2017 by pady_1

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Difference between adsorption and absorption:

answered Jun 22, 2017 by pady_1

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What is Adsorbate and Adsorbent?

answered Jun 22, 2017 by pady_1

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What is Adsorption?

asked Jun 22, 2017 by pady_1

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Explain how the phenomenon of absorption finds application in each of the following process : (i) Production of vaccum (ii) Heterogeneous catalysis

answered Nov 25, 2016 by meena.p

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Dialysis is a method of purification of sols, But prolonged dialysis of the sol makes it unstable . Why ?

answered Nov 23, 2016 by meena.p

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On visit to your native village, you find that lot of smoke, dust and some other gases are coming out of the chimney of a recently set up factory near the village which is the cause of many respiratory problems for the people living there. Answer the following questions (i) As a chemistry student, what method you will suggest the factory owner to manage dust and smoke? (ii) What is the basic principle involved in your suggestion? (iii) What values are associated with your advice?

answered Nov 22, 2016 by meena.p

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$SnO_2$ forms a positively charged colloidal Sol in the basic medium why ?

answered Nov 22, 2016 by meena.p

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Write two difference between sols and emulsions.

answered Nov 17, 2016 by meena.p

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Explain : (i) The molecules $NH_3$ and $NF_3$ have dipole moments which are of opposite direction . (ii) Sulphur in vapour state exhibits paramagnetism

answered Nov 17, 2016 by meena.p

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What is observed when : (i) A beam of light is passed through a colloidal solution ? (ii) Electric current is passed through a colloidal solution ?

answered Nov 16, 2016 by meena.p

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Why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding?

answered Nov 14, 2016 by meena.p

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Depict the galvanic cell in which the reaction $2Zn(s) +2 Ag^{+}(aq) \to Zn ^{2+}(aq) +2 Ag(s) $ takes place . Further show: (i) Which of the electrode is negatively charged? (ii) The carriers of the current in the cell. (iii) Individual reaction at each electrode.

answered Nov 4, 2016 by meena.p

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Why is ferric chloride preffered over potassium in case of a cut leading to bleeding ?

answered Nov 4, 2016 by meena.p

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Explain what is observed when (a) an electric current is passed through a solution . (b) a beam of light is passed through a solution (c) an electrolyte (say NaCl) is added to ferric hydroxide solution .

answered Nov 3, 2016 by meena.p

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What is the main cause of charge on a colloidal solution ?

answered Oct 31, 2016 by meena.p

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Out of C and CO, which is a better reducing agent for ZnO ?

answered Oct 27, 2016 by meena.p

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Give one example each of oil in water and water in oil emulsion.

answered Oct 25, 2016 by meena.p

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Why does a galvanic cell become dead after some time ?

answered Oct 25, 2016 by meena.p

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Why does physiorption decrease with increase of temperature ?

answered Oct 20, 2016 by meena.p

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On dissolving $19.5\;g$ of $CH_2FOOH$ in $500\;g$ of water, a depression of $1^{\circ}C$ in freezing point of water is observed . Calculate the van't Hoff factor and dissociation constant of fluoro acetic acid Given $K_f= 1.86\;k kg mol^{-1}$

answered Oct 20, 2016 by meena.p

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What is the difference between physisorption and chemisorption?

answered Oct 17, 2016 by meena.p

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Absorption of gases on solid surface is generally exothermic because absorption

answered Oct 13, 2016 by meena.p

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