Which one of the following is not a semiconductor ?

Related Mcqs:

Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C.

A. 26% B. 27% C. 37% D. <2.6%...

Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?

A. As nitrometer B. To remove air bubbles from molten metal C. To produce alloy D. As insulator...

The coloured glassy mass in borax bead test is due to the formation of___________________?

A. metal borate B. metal meta borate C. metal boride D. metal silicate...

Boric acid cannot be used__________________?

A. As antiseptic in medicine B. For washing eyes C. In soda bottles D. For enamel and glazes...

Which element can form tripositive ion ?

A. Beryllium B. Carbon C. Silicon D. Aluminium...