In an oxidation process
A.oxidation number decreases
B.number of electrons decreases
C.oxygen content decreases
D.number of ions decreases
Category: Chemical Technology Mcqs
Pyrex glass is resistant to sudden temperature variations because it has
A.low coefficient of expansion
B.high softening temperature
C.low density and high melting point
D.high coefficient of expansion
Soda ash is also called
A.sodium carbonate
B.sodium hydroxide
C.sodium bicarbonate
D.sodium oxide
The material used to give blue coloration to glass is
A.NiO
B.CaO
C.FeSO4
D.CdS
Producer gas is obtained by
A.thermal cracking of naphtha
B.passing steam and air through red hot coke
C.passing air through red hot coke
D.passing steam through red hot coke
The flow of current is actually flow of
A.?-particles
B.?-particles
C.? -praticles
D.mesons
The lightest gas which is non-inflammable is
A.H2
B.He
C.N2
D.Ar
High purity oxygen is used for
A.welding
B.cutting of metals
C.medicinal purposes
D.all of the above
H2S from petroleum refinery streams is recovered by scrubbing with
A.ethanol
B.ethabol amines
C.water
D.98.5% H2SO4
Glass is
A.a crystalline solid
B.a super cooled liquid
C.a solid having a definite melting point
D.a compound of Ca Na Si and O
