Chemically,philosopher's wool is

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Question

(A) When zinc is burned in the presence of air,woolly tufts form,which is known as 'Lana philosophica' in Latin. 'Lana philosophica' means philosopher

Vedclass · Accepted Answer

$ZnO$

Vedclass · Answer

(A) When zinc is burned in the presence of air,woolly tufts form,which is known as 'Lana philosophica' in Latin. 'Lana philosophica' means philosopher's wool. The woolly tufts consist of zinc oxide $(ZnO)$.Zinc sulphide $(ZnS)$ is known as zinc blende.$ZnO_2$ is known as zinc peroxide.$ZnSO_4$ is known as zinc sulphate.We can prepare philosopher's wool by burning zinc in the presence of oxygen or by reacting zinc with steam:$Zn + 1/2 O_2 ightarrow ZnO$$Zn + H_2O 	ext{ (steam)} ightarrow ZnO + H_2$Zinc oxide is used in ointments for skin diseases,as a white pigment in paints,and in rubber,plastic,cosmetic,and battery industries. Due to its wool-like texture,it is commonly known as philosopher's wool.

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