_______________ is a donor impurity for semi-conductors ?

Related Mcqs:

Mixing vessel used for the chlorination of methane to produce methyl chloride is made of___________________?

A. Copper B. Cast iron C. Aluminium D. High carbon steel...

Wrought iron is a suitable material of construction for handling _____________ solutions?

A. Dilute acidic B. Concentrated acidic C. Alkalis & alkaline D. None of these...

Tin in its pure form is used for making_______________?

A. Cans for food packing B. Collapsible tubes for toilet preparations C. Foil for wrapping cheese D. All A., B. and C....

For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is__________________?

A. Stainless steel B. Cast iron C. Aluminium D. Nickel...

Spark plugs, ignition tubes and electrodes are made of nickel ____________ alloys?

A. Beryllium B. Manganese C. Copper D. Iron...