Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is ____________ °C?
A. -5 to 0
B. 5 to 10
C. 30 to 50
D. 75 to 80
Chemical Process
Reverse osmosis is normally used for the_______________?
Reverse osmosis is normally used for the_______________?
A. Separation of isotopes of uranium from gaseous uranium hexafluoride
B. Separation of helium from natural gas
C. Desalination of brackish water to produce potable (drinking) water
D. Purification of oxygen
Chloral is used in the manufacture of__________________?
Chloral is used in the manufacture of__________________?
A. DDT
B. BHC
C. Parathion
D. None of these
Higher viscosity index of a lubricating oil denotes_______________?
Higher viscosity index of a lubricating oil denotes_______________?
A. Less changes in fluidity of oil with temperature
B. Substantially high change in fluidity of oil with temperature
C. Its unsuitability under varying temperature conditions
D. None of these
Hydrochloric acid is also known as_________________?
Hydrochloric acid is also known as_________________?
A. Oil of vitriol
B. Muriatic acid
C. Strong organic acid
D. Green acid
Ordinary glass is not a/an_________________?
Ordinary glass is not a/an_________________?
A. Amorphous isotropic material
B. Supercooled liquid
C. Material with sharp definite melting point
D. Electrical insulator
Wax is a___________________?
Wax is a___________________?
A. Mixture of glycerides
B. Mixture of esters of polyhydric alcohols excepting glycerine
C. Liquid at room temperature
D. Mixture of glycerides of fatty acids
Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood?
Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood?
A. 1
B. 2.5
C. 5
D. 10
Unsaturated oils compared to saturated oils have___________________?
Unsaturated oils compared to saturated oils have___________________?
A. Lower melting point & higher reactivity to oxygen
B. Higher melting point & higher reactivity to oxygen
C. Lower melting point & lower reactivity to oxygen
D. Higher melting point & lower reactivity to oxygen
Terylene is__________________?
Terylene is__________________?
A. Same as Dacron
B. A polyester
C. Both A. & B.
D. Neither A. nor B.