7112Chemical EngineeringMedium
________ is a donor impurity for semi-conductors?
AAntimony
BGallium
CNone of these
DBoron
Correct answer
A. Antimony
Explanation
The correct answer is Antimony.
Correct answer
A. Antimony
Explanation
The correct answer is Antimony.
Centrifugal pump can’t be used to pump ________?
°API gravity of water at N.T.P. is about________?
Mesh indicates the number of holes per________?
Reciprocating pumps compared to centrifugal pumps________?
Presence of even very minute amount (say 0.1%) of ________ in copper, reduces its electrical conductivity very seriously?
Young’s modulus of a material is the measure of its ________?