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Recent questions tagged surface-chemistry
Questions
At isoelectric point the colloidal particles
jeemain
chemistry
class12
unit5
surface-chemistry
difficult
asked
Mar 19, 2014
by
yamini.v
1
answer
Plot of $\;log\; \large\frac{x}{m}\;$ against $\;log\; P$ is a straight line inclined at an angle of $\;45^{0}\;$ . When the pressure is 0.5 atm and Freundlich parameter , $K$ is $10.6$ , the amount of the solute adsorbed per gram of adsorbed will be $\;(log\; 5 = 0.0990)\;$
jeemain
chemistry
class12
unit5
surface-chemistry
difficult
asked
Mar 19, 2014
by
yamini.v
1
answer
Adsorption is accompanied by
jeemain
chemistry
class12
unit5
surface-chemistry
difficult
asked
Mar 19, 2014
by
yamini.v
1
answer
$10^{-4}\;g$ of gelatin is required to be added to $\;100\;cm^{3}$ of a standard gold sol to just prevent its coagulation by the addition of $\;1\;cm^{3}$ of $\;10\%\;$ NaCl solution to it . Hence , the gold number of gelatin is
jeemain
chemistry
class12
unit5
surface-chemistry
difficult
asked
Mar 19, 2014
by
yamini.v
1
answer
The colour of a colloidal solution depends upon
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
A colloidal solution of gold in water is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
The average particle mass in colloidal solutions can be determined by
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
The CMC of a given soap in water is $\;10^{-3}\;molL^{-1}\;.$ A $\;10^{-4}\;molL^{-1}\;$ solution of this soap in water is a
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Gold numbers of protective colloids A ,B ,C and D are 0.50 , 0.01 , 0,05 and 0.005 respectively , the correct order of their protective powers is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Langmuir adsorption isotherm is deduced using the assumption
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
The reactions given below , are the catalyst and corresponding process / reaction are matched , the mismatch is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
A plot of x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which of the following reactions shows the formation of positively / negatively charged sol correctly?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
The number of moles of lead nitrate needed to coagulate a mol of colloidal $\;[AgI]I^{-}\;$ is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which among the following statements are connect with respect to adsorption of gases on a solid ?$\; \;$ (1) The extent of adsorption is equal to $\;kp^{n}\;$ according to freundlich isotherm.$\;\;$ (2) The extent of adsorption is equal to $\;kp^{\large\frac{1}{n}}\;$ according to freundlich isotherm . $\;\;$ (3) The extent of adsorption is equal to $\;\large\frac{(a+bp)}{ap}\;$ according to freundlich isotherm . $\;\;$ (4) The extent of adsorption is equal to $\;\large\frac{ap}{(1+bp)}\;$ according to freundlich isotherm . $\;\quad\;$ (5) Freundlich adsorption fails at a low pressure .
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which of the following diagram shows the situation of the $As_2S_3$ particles after electrophoresis?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
The coagulation of 200 mL of a positive colloid took place . When 0.73 g Hcl was added to it without changing the volume much . The flocculation value of Hcl for the colloid is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
What is the equation form of Langmuir isotherm under high pressure ?
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which of the following is used to produce smoke screens ?
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which one of the following forms micelles in aqueous above certain concentration .
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Which of the following explains the process of de-emulsification?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
Which among the following is a non-elastic gel?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
Which of the following below is used as an eye lotion?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
Fertile soils are also colloidal in nature. Which of the following acts as a protective colloid in soil?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 18, 2014
by
mosymeow_1
1
answer
The volume of a couridal particle , $\;V_{c}\;$ as compared to the volume of a solute particle , $\;V_{s}\;$ in a true solution could be
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
In Zeigler-Natta polymerization of ethylene the active spices is
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Milk can be preserved by adding a few drops of
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 18, 2014
by
yamini.v
1
answer
Bredig's arc method is a method of preparation of colloidal solution, of metals such as gold, silver or platinum. Which of the following is involved in this method?
surface-chemistry
jeemain
chemistry
easy
asked
Mar 17, 2014
by
balaji.thirumalai
1
answer
Why is a negatively charged sol formed when FeCl$_3$ is added to NaOH?
surface-chemistry
jeemain
chemistry
easy
asked
Mar 17, 2014
by
balaji.thirumalai
1
answer
A sample of charcoal weighing $8\; g$ was brought into contact with a gas contained in a vessel of 1 Litre capacity at $37^{\circ}$. The pressure of the gas was found to fall from 700 to 450 mm. Calculate the volume of the gas (reduced to standard temperature and pressure, i.e, STP) that is adsorbed per gram of the adsorbent under the condition of the experiment (density of charcoal sample is 1.5 g cm3).
surface-chemistry
medium
chemistry
jeemain
asked
Mar 17, 2014
by
balaji.thirumalai
0
answers
Which of the following states the reason behind the formation of 'Tail of Comets' phenomenon in a colloidal solution?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
2
answers
Which of the following is INCORRECT?
surface-chemistry
jeemain
chemistry
medium
asked
Mar 17, 2014
by
balaji.thirumalai
1
answer
The coagulating power of an electrolyte for arsenious sulphide sol decreases in the order:
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
STEM stands for
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The colour of a colloidal solution depends upon
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
2
answers
A colloidal solution of gold in water is
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The average particle mass in colloidal solutions can be determined by
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The CMC of a given soap in water is $10^{-3}$ mol/L. A $10^{-4}$ mol/L solution of this soap in water is a
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.05 and 0.005 respectively. The correct order of their protective powers is
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
Langmuir adsorption isotherm is deduced using the assumption.
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The reactions given below, are the catalyst and corresponding process / reaction are matched, the mismatch is
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
A plot of $\log \;\dfrac{x}{m}$ versus $\log\; p$ for the adsorption of a gas on a solid gives a straight line with slope equal to
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The number of moles of lead nitrate needed to coagulate 2 mol of colloidal $[AgI]I^-$ is
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
Which among the following statements are correct with respect to adsorption of gases on a solid?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
The coagulation of 200 mL of a positive colloid took place when 0.73 g HCl was added to it without changing the volume much. The flocculation value of HCl for the colloid is
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
What is the equation form of langmuir isotherm under high pressure?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
Which of the following is used to produce smoke screens?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 17, 2014
by
mosymeow_1
1
answer
Which of the following molecule is most suitable to disperse benzene in water?
surface-chemistry
jeemain
chemistry
class12
unit5
medium
asked
Mar 16, 2014
by
mosymeow_1
1
answer
Which of the following forms micelles in aqueous solution, above certain concentration?
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 16, 2014
by
mosymeow_1
1
answer
The volume of a colloidal particle, $V_c$ as compared to the volume of a solute particle, $V_s$ in a true solution could be
jeemain
chemistry
class12
unit5
surface-chemistry
medium
asked
Mar 16, 2014
by
mosymeow_1
1
answer
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