Tags Surface Chemistry

Surface Chemistry

Get insights from 216 questions on Surface Chemistry, answered by students, alumni, and experts. You may also ask and answer any question you like about Surface Chemistry

Follow Ask Question

216

Questions

Discussions

Active Users

Followers

New answer posted

6 months ago

Surface Chemistry Class 12th

Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because:

0 Follower 1 View

Vishal Baghel

Contributor-Level 10

Micelles are not formed because it formed above CMC.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

Given below are the critical temperature of some of the gases:

Gas	Critical temperature (K)
He	5.2
CH₄	190.0
CO₂	304.2
NH₃	405.5

The gas showing least adsorption on a definite amount of charcoal is

0 Follower 1 View

Payal Gupta

Contributor-Level 10

Higher adsorbtion of gas is corresponds to higher liquefaction and higher liquefaction is directly proportional to the higher critical temperature.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

For micelle formation, which of the following statements are correct?

A. Micelle formation is an exothermic process.

B. Micelle formation is an endothermic process.

C. The entropy change is positive.

D. The entropy change is negative.

0 Follower 3 Views

Payal Gupta

Contributor-Level 10

During micelle formation, $Δ S$ is positive

Micelle formation is endothermic at low temperature and exothermic at high temperature.

At room temperature ⇒ Micelle formation is endothermic.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

Match the List-I with List-II

List – I List – II

(A) Lyophilic colloid

...more

0 Follower 3 Views

Vishal Baghel

Contributor-Level 10

Emulsion are liquid colloids, protective colloids are lyophilic, FeCl3 + H2O $\overset{Δ}{\to} (+ v e) l y$ charged colloids and FeCl3 + NaOH $\to_{}^{}$ (-ve)ly charged colloids.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R.

Assertion A: Activated charcoal adsorbs SO₂ more efficiency than CH₄.

Reason R: Gases with lower critical temperature are readily adsorbed by activated charcoal.

In the light of the above statements, choose the correct answer from the options given below:

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

SO₂ is absorbed to a greater extent then CH₄ on activated charcoal under same Gases with higher critical temperature are readily absorbed by activated charcoal.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

For kinetic study of the reaction of iodide ion with H₂O₂ at room temperature:

(A) Always use freshly prepared starch solution.

(B) Always keep the concentration of sodium thiosulphate solution less than that of Kl solution.

(C) Record the time immediately after the appearance of blue colour.

(D) Record the time immediately before the appearance of blue colour.

(E) Always keep the concentration of sodium thiosulphate solution more than that of Kl solution.

Choose the correct answer from the options given below:

0 Follower 3 Views

Vishal Baghel

Contributor-Level 10

Always fresh solution of starch used and recorded immediately after the blue colour appears. Na2S2O3 is used in limited amount.

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

Given below are the critical temperature of some of the gases:

0 Follower 1 View

alok kumar singh

Contributor-Level 10

Higher adsorbtion of gas is corresponds to higher liquefaction and higher liquefaction is directly proportional to the higher critical temperature.

0 0

New question posted

6 months ago

Surface Chemistry Class 12th

Given below are the critical temperature of some of the gases:

0 Follower 1 View

New answer posted

6 months ago

Surface Chemistry Class 12th

The separation of two coloured substances was done by paper chromatography. The distance travelled by solvent front, substance A and substance B from the base line are 3.25cm, 2.08cmand 1.05cm, respectively. The ratio of R_f values of A to B is ________.

0 Follower 4 Views

Payal Gupta

Contributor-Level 10

$R_{f}^{0} = distance travelled by the solute$ $/$ $/ distance travelled by the solvent$

${(R_{f})}_{A} = \frac{2.08}{3.25} {(R_{f})}_{B} = \frac{1.05}{3.25}$

$\frac{{(R_{f})}_{A}}{{(R_{f})}_{B}} = \frac{2}{1}$

0 0

New answer posted

6 months ago

Surface Chemistry Class 12th

Incorrect statement for Tyndall effect is:

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

$A l^{+ 3}$ → number of electrons = 10

Br → number of electrons = 36

$B e^{+ 2}$ → number of electrons = 2

$C l^{-}$ → number of electrons = 18

$L i^{+}$ → number of electrons = 2

$S^{- 2}$ → number of electrons = 18

K⁺ → number of electrons = 18

O^-2 → number of electrons = 10

Mg⁺² → number of electrons = 10

O^-2 & Mg⁺² are isoelectronic with Al⁺³

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

66k Colleges
1.2k Exams
686k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Surface Chemistry

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience