Mark the correct statement/s about $Z n O$ :

It is amphoteric in nature

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It is yellow when cold and white when hot

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When heated with cobaltous nitrate, it forms a green colored compound - zinc cobaltonitrate also known as Rinmann's green

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It is used as a catalyst along with

C r_{2} O_{3}

in the manufacturing of methyl alcohol from water gas

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Solution

The correct options are
A It is amphoteric in nature
D It is used as a catalyst along with $C r_{2} O_{3}$ in the manufacturing of methyl alcohol from water gas
a) $Z n O$ is amphoteric in nature.
b) It is white when cold and yellow when hot.
c) Cobalt zincate $[C o (Z n O_{2})]$ is formed:
$2 Z n O + 2 C o (N O_{3})_{2} ⟶ 2 C o (Z n O_{2}) + 4 N O_{2} + O 2$
d) $Z n O$ is used as a catalyst along with $C r_{2} O_{3}$ in the manufracture of methyl alcohol from a mixture of carbon monoxide and hydrogen.

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Similar questions

Q. When zinc oxide is heated with cobalt nitrate, a green mass is formed due to the formation of a compound which is known as Rinmann’s green. The compound is:

Q. Methyl alcohol when reacted with carbon monoxide using cobalt or rhodium as catalyst , compound

^{'} A^{'}

is formed.

^{'} A^{'}

on heating with HI in the presence of red phosphorus as catalyst

^{'} B^{'}

is formed.

^{'} B^{'}

is:

Methyl alcohol when reacted with CO using cobalt or Rhodium as catalyst, compound (A) is formed. (A) on heating with HI in presence of red phosphorous as catalyst gives (B). Identify (B)

Z n O

is white when cold and yellow when heated. It is due to development of:

Q. The catalyst used in the manufacturing of methyl alcohol from water gas is:

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Mark the correct statement/s about ZnO:

Mark the correct statement/s about $Z n O$ :