Question

The term activation of adsorbent is used when:
A. Adsorbing power is increased by increasing surface area by making the surface rough
B. Adsorbing power is increased by dipping the surface in acid to make it smooth
C. Adsorbing power is increased by dissolving it in water
D. Adsorbing power is decreased to reduce the extent of adsorption

Answer 1

Hint: In order to answer the question, firstly we will know the meaning of Activation of adsorbent and then only we can know why adsorbent needs to be activated. The activation of adsorbent can be done only by powdering it.

Complete answer:Activation of adsorbent means, increasing the adsorbing power of the adsorbent. This can be achieved by making their surface rough by mechanical rubbing or by chemical action. By doing so, it will increase the specific area of the adsorbent.Activation of adsorbent surface is done as such to give more number of empty destinations on the surface of adsorbent. This should be possible by breaking strong precious stone in little pieces, warming charcoal at high temperature, breaking chunk of strong into powder or different techniques reasonable for specific adsorbent.The main question arises here is that how we activate an adsorbent, so by activating an adsorbent, we tend to increase the adsorbing power of the adsorbent. We can activate by increasing the surface area of the adsorbent. This can be done by breaking it into smaller pieces or powdering it.And, the surface area of an adsorbent depends on its structure: the more pores it has, the more noteworthy the region, which impacts responses on surfaces.

Hence, the correct option is (A.) adsorbing power is increased by increasing surface area by making the surface rough.

Note:If we are using a certain adsorbent to adsorb heavy metals then we can regenerate the adsorbent using acid solution. In other cases basic solutions is the best choice for activation and regeneration.