Which of the following statements is $NOT$ correct regarding the adsorption of a gas on a solid surface?

  • A
    Adsorption is always exothermic.
  • B
    Physisorption can transform into chemisorption at high temperatures.
  • C
    Physisorption increases with an increase in temperature,whereas chemisorption decreases with an increase in temperature.
  • D
    Chemisorption is more exothermic than physisorption,yet it is very slow due to high activation energy.

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Similar Questions

The number of statement/s which are the characteristics of physisorption is
$A.$ It is highly specific in nature
$B.$ Enthalpy of adsorption is high
$C.$ It decreases with increase in temperature
$D.$ It results into unimolecular layer
$E.$ No activation energy is needed

Assertion $(A)$: Finely divided charcoal can act as an adsorbent.
Reason $(R)$: Finely divided material has a small surface area.

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: In expensive scientific instruments,silica gel is kept in watch-glasses or in semipermeable membrane bags.
Reason $(R)$: Silica gel adsorbs moisture from air via adsorption,thus protects the instrument from water corrosion (rusting) and/or prevents malfunctioning.
In the light of the above statements,choose the correct answer from the options given below:

When $200 \, mL$ of $0.2 \, M$ acetic acid is shaken with $0.6 \, g$ of wood charcoal,the final concentration of acetic acid after adsorption is $0.1 \, M$. The mass of acetic acid adsorbed per gram of carbon is $...... \, g$.

During the process of adsorption,

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