Question

Manganese dioxide given $MnC{l_2}$​ on treating with:
A. $HCl$
B. $CuS{O_4}$
C. ${H_2}$
D. $C{O_2}$

Answer 1

Hint: Manganese oxide is the inorganic compound having the formula \[Mn{O_2}\] ​. This is generally blackish or brown solid which occurs naturally as the mineral known as pyrolusite. Chemical reaction should be done to see the correct result.

Complete step by step answer:
- Manganese dioxide, \[Mn{O_2}\] has many uses, as the manufacture of batteries, beverage cans, agricultural pesticides and fungicides and electronic circuitry. However it gives $MnC{l_2}$ on reacting with:
- Manganese oxide is the inorganic compound having the formula \[Mn{O_2}\] ​. This is generally blackish or brown solid which occurs naturally as the mineral known as pyrolusite, Manganese oxide when reacts with $HCl$ and release the​ gas $C{l_2}$ forming $MnC{l_2}$​ along with water.
 \[ \Rightarrow Mn{O_2} + 4HCl \to MnC{l_2} + C{l_2} + 2{H_2}O\]
As we can see the above given reaction which results in the formation of $MnC{l_2}$ occurs by treating Manganese dioxide with $HCl$ . The correct answer is option “A” .

Additional Information :
- Manganese is mainly found in the bones, liver, kidneys, and pancreas, as according to the University of Maryland Medical Center, it actually helps the body in forming connective tissue, bones, blood-clotting factors, and sex hormones in the body. According to Lenntech, manganese is not only essential to humans, but also to all the species.
- Hydrochloric acid or also known as muriatic acid is a colourless inorganic chemical system having the chemical formula $HCl$ . Hydrochloric acid has a very distinctive pungent smell. It is often classified as strongly acidic and can also attack the skin over a high composition range, as the hydrogen chloride completely gets dissociated in an aqueous solution.
Manganese chloride is formed by treating manganese oxide with concentrated hydrochloric acid as stated in the answer.

Note: By observing the hint and chemical formula of manganese oxide, this question can be easily answered. Firstly, chemical reactions should be noted so that we can get a clear result and in these types of questions, it is very important to know the chemical reactions.