A chemical change occurs when iron
A.rusts
B.is magnetised
C.is heated
D.melts
Category: Chemical Engineering Mcqs
The gradual cooling of glass products is called
A.tempering
B.annealing
C.quenching
D.galvanising
The atomic heat capacities of all solid elements
A.decreases greatly with decrease in temperature
B.increases greatly with decrease in temperature
C.remains unaffected with change in temperature
D.approaches a value of infinity at absolute zero temperature
Sulphuric acid produced by contact process is
A.cheaper
B.pure and concentrated
C.of poor quality
D.very dilute
The best fertilizer for rice paddies is
A.urea
B.ammonium sulphate
C.superphosphate
D.calcium ammonium nitrate
If there is no condensation of carrier steam in the steam distillation of high-boiling organic materials the steam consumption is minimum at
A.the highest permissible temperature and pressure
B.the lowest practicable temperature and pressure
C.the highest permissible temperature and the lowest practicable pressure
D.the lowest temperature and the highest practicable pressure
The monometallic catalyst used in the catalytic reforming of naphthas is
A.Pt
B.Ni
C.Fe
D.V2O5
A substance is said to be malleable if it
A.does not react with acids and alkalies
B.can be hammered to thin sheets
C.has a very high melting point
D.has a metallic lustre
The ratio of heat transfer coefficient to the flow of heat per unit temperature rise due to the velocity of the fluid is known as
A.Prandtl number
B.Grashoff number
C.Stanton number
D.Weber number
LPG
A.is a mixture of a saturated and unsaturated hydrocarbons in the C3 and C4 range
B.is a mixture of methane and carbon dioxide
C.is a mixture of methane and hydrogen
D.is a mixture of saturated and unsaturated hydrocarbons in the C6 and C7 range
