Question

Chemically philosopher's wool is:
 A) $ZnO$
B) $BaO$
C) $HgCl$
D. $H{g_2}C{l_2}$

Answer 1

Hint:Initially you must be aware what is philosopher's wool, its uses and how it is formed. Also you should know about why the compound is called philosopher's wool (is that compound resembles wool or the properties of wool).

Complete answer:
Zinc oxide is a compound with the formula \[ZnO\]. \[ZnO\]is a white powder that's insoluble in water, which is widely used as an additive in numerous materials and products including plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods (source of Zinc nutrient), batteries, ferrites, fire retardants, and care tapes.
Alchemists, as a neighborhood of their rituals, would burn zinc in air and collect the residue, which formed into white woolly tufts. They called it Lana philosophica in Latin, meaning zinc oxide.
\[ZnO\] has a wide-bandgap semiconductor of the II-VI semiconductor group (since oxygen was classed as a component of VIA group (the 6th main group, now mentioned as 16th) of the table and zinc, a transition metal, as a member of the IIB (2nd B), now 12th, group). The native doping of the semiconductor (due to oxygen vacancies or zinc interstitials) is n-type. This semiconductor has several favourable properties, including good transparency, high electron mobility, wide bandgap, and powerful room-temperature luminescence.

Hence,the correct option is A.

Note:Barium oxide is harmful to human skin and if swallowed in large quantities causes irritation. Excessive quantities of barium monoxide may cause death.The formula for an anomalous sort of mercury (I) chloride (mercurous chloride).Mercury(I) chloride is that compound with the formula Hg2Cl2. Also referred to as the mineral calomel (a rare mineral) or calomel