In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?

Related Mcqs:

Boron is non metal while other elements of IIIA group are metals. This is because______________?

A. it has small size B. it has high nuclear charge C. it forms molecular addition compounds D. all of the above...

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...

If temperature of gallium arsenide is increased then its conductivity will___________________?

A. decrease B. increase C. remains constant D. first decreases then increases...