Surface Chemistry

The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is :

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

The sol given below with negatively charged colloidal particles is :

Match List I with List II :


List-IExample of colloids
List - IIClassification




(a) Cheese
(i) dispersion of liquid in liquid


(b) Pumice stone
(ii) dispersion of liquid in gas


(c) Hair cream...

In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption \(\left( {{x \over m}} \right)\) is directly proportional to Px. The value of x is :

Which one of the following statements is FALSE for hydrophilic sols?

In Freundlich adsorption isotherm, slope of AB line is :

Most suitable salt which can be used for efficient clotting of blood will be :

When silver nitrate solution is added to potassium iodide solution then the sol produced is :

The conditions given below are in the context of observing Tyndall effect in colloidal solutions :(A) The diameter of the colloidal particles is comparable to the wavelength of light used.(B) The diameter of the colloidal particles is much ...

100 ml of 0.0018% (w/v) solution of Cl\(-\) ion was the minimum concentration of Cl\(-\) required to precipitate a negative sol in one h. The coagulating value of Cl\(-\) ion is _________ (Nearest integer)

Match List - I with List - II :
Choose the most appropriate answer from the options given below.

The charges on the colloidal CdS sol and TiO2 sol are, respectively :

A colloidal system consisting of a gas dispersed in a solid is called a/an :

For the coagulation of a negative sol, the species below, that has the highest flocculating power is :

The INCORRECT statements below regarding colloidal solutions is :

A mixture of gases O2, H2 and CO are taken in
a closed vessel containing charcoal. The graph
that represents the correct behaviour of
pressure with time is :

As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the
order :

For the following Assertion and Reason, the
correct option is
Assertion : For hydrogenation reactions, the
catalytic activity increases from Group 5 to
Group 11 metals with maximum activity shown
by Group 7-9 elements.
Reason : The reactant...

Kraft temperature is the temperature :

For Freundlich adsorption isotherm, a plot of
log (x/m) (y-axis) and log p (x-axis) gives a
straight line. The intercept and slope for the
line is 0.4771 and 2, respectively. The mass of
gas, adsorbed per gram of adsorbent if the
initial pr...

Identify the correct molecular picture showing
that happens at the critical micellar
concentration (CMC) of an aqueous solution of
a surfactant ( ◍ polar head; ∼ non-polar tail;
● water).

Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed
on mass m of the adsorbent, the correct plot of \({x \over m}\) versus p is :

Match the following :

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A sample of red ink (a colloidal suspension) is
prepared by mixing eosin dye, egg white, HCHO
and water. The component which ensures
stability of the ink sample is :

Tyndall effect is observed when:

An ionic micelle is formed on the addition of :

The mass of gas adsorbed, x, per unit mass of
adsorbate, m, was measured at various pressures,
p. A graph between \(\log {x \over m}\)
and log p gives a
straight line with slope equal to 2 and the intercept
equal to 0.4771. The value of
$$...

Which of the following is used for the
preparation of colloids?

Amongst the following statements regarding
adsorption, those that are valid are
(a) \(\Delta\)H becomes less negative as adsorption
proceeds
(b) On a given adsorbent, ammonia is
adsorbed more than nitrogen gas
(c) On adsorption, the residu...

Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure P. \({x \over m}\) is proportional to :

For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?

Match the catalysts (Column I) with products
(Column II).

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The aerosol is a kind of colloid in which :

Adsorption of a gas follows freundlich adosorbed isotherm. x is the mass of the gas adsorbed on
mass m of the adsorbent. The plot log \(x \over m\) versus log p is shown in the given graph. \(x \over m\) is
proportional to :

Given

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Among the following the false statement is -

Peptization is a :

Among the following, the INCORRECT statement about colloids is :

An example of solid sol is :

Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :

Which of the following is not an example of heterogenous catalytic reaction?

Haemoglobin and gold sol are examples of :

A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation
\({x \over m} = k{p^{0.5}}\)
Adsorption of the gas increase with :

The correct option among the following is :

Which one of the following is not a property of physical adsorption?

Which of the following statements about colloids is False ?

If x gram of gas is adsorbed by m gram of adsorbent at pressure P, the plot of log \({x \over m}\) versus log P is linear. The slope of the plot is :
(n and k are constants and n > 1)

Adsorption of a gas on a surface follows Freundlich adsorption isotherm. Plot of
log \({x \over m}\) versus log p gives a straight line with slope equal to 0.5, then:
( \({x \over m}\) is the mass of the gas adsorbed per gram of adsorbent)

Among the following, correct statement is :