What is the explosive range for hydrogen
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.3.2 to 12.5 %
D.2.1 to 9.4 %
Category: Chemical Engineering Mcqs
Hydrogen peroxide is concentrated by
A.distillation at atmospheric pressure
B.crystallization
C.dehydration
D.vacuum distillation
The concentration of the nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about
A.95 wt. %
B.57-60 wt. %
C.100 wt. %
D.75 wt. %
The surface temperature of the sun is
A.2000?K
B.6000?K
C.20000?K
D.Millions of degrees
E.Infinitely large
Positive ions are formed from neutral atoms by the loss of
A.neutrons
B.protons
C.electrons
D.mesons
A catalyst is a substance which
A.increases the equiliibrium concentration of the product
B.changes the equilibrium constant of the reaction
C.shortens the time to reach equilibrium
D.suppliies energy to the reaction.
Too much excess air gives
A.high percentages of O2 in the flue gas
B.high stack temperature
C.increased fuel consumption for the same heating requirement
D.all these answers
The specific heat of saturated water vapour at 100?C is
A.zero
B.positive
C.negative
D.infinity
A hollow sphere with uniform interior temperature and a small hole behaves very nearly as a
A.Grey body
B.White body
C.Opaque body
D.Transparent body
E.Black body
