Question

Assertion
In fused state, calcium chloride cannot be used to dry alcohol or $N{H_3}$
Reason:
$CaC{l_2}$is not a good desiccant.
A. Both assertion and reason are cannot and reason is the cannot explanation for assertion
B. Both assertion and reason are correct but reason is not the correct explanation for assertion
C. Assertion is correct but reason is incorrect
D. Both assertion and reason are incorrect

Answer 1

Hint: To solve this question, we need to understand the concept of desiccant. We can define a desiccant as a hygroscopic substance which can be used to induce or maintain a state of dryness i.e. desiccation in its vicinity. Also, it is called the opposite of a humectant. Desiccants are found in many forms other than solid.

Complete step by step answer:
We know that to be a good desiccant it is important to help other substances to get dry quickly which will further save energy and time. The main purpose of a desiccant is to keep products dry and stable. They absorb moisture from air either by physical adsorption or by chemical reaction. Thus, it reduces the humidity in the headspace of sealed containers.
According to the question, we know that Calcium chloride i.e. $CaC{l_2}$ effectively absorbs moisture from the air. It can attract its own weight in water and dissolves into liquid brine only if the air is humid enough and the temperature is high enough. The water gets trapped in a membrane-protected chamber, which prevents captured water from spilling or re-evaporating into the surrounding air.
Also, we know that the combination of calcium chloride's effective moisture absorption and Absortech's patented design is protection that is proven superior to others. The desiccants of calcium chloride have a higher absorption rate than other traditional solutions.Therefore, we can conclude that the assertion statement is correct but the reason given is incorrect

So, the correct answer is Option C.

Note:
After solving this question, we need to know a few more desiccants such as activated alumina, Aerogel, Bentonite clay, Calcium oxide, Calcium sulfate (Drierite), Cobalt(II) chloride, Lithium chloride, Lithium bromide, etc.