| (I) Gallium \[(Ga)\] is used in making high temperature thermometer because of its low melting and high boiling point. |
| (II) Germanium \[(Ge)\] is transparent in the infrared (IR) region and therefore it is used in the making of IR windows, prisms and lenses. |
| (III) Tellurium \[(Te)\] is used as a photoconductor in photo copying \[(Xerox)\] machines and also for decolouriser of glass. |
| (IV) High melting point of boron is due to icosahedron structure. |
A) I, II, III
B) I, II, IV
C) II, III, IV
D) All of the above
Correct Answer: B
Solution :
[b] Statement (III) is INCORRECT CORRECT statement: Selenium (Se)
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