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Identify incorrect statements from the following
A) GaAs (Gallium Arsenide) is a very poor semiconductor.
B) ReO₃ resembles cobalt in its appearance and conductivity
C) Ice is a polar molecular solid
D) Crystal structure of $K_{2} {Cr}_{2} O_{7}$ is monoclinic.

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A, B, D only

A, B, C only

A, C, D only

B, C, D only

answer is A.

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Detailed Solution

A) GaAs (Gallium Arsenide) is a very good semiconductor.

B) ReO₃ resembles copper in its appearance and conductivity.

C) Ice is a polar molecular solid.

D) Crystal structure of $K_{2} {Cr}_{2} O_{7}$ is triclinic.

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