A. Alkalis
B. SO2
C. H2SO4
D. Oxidising atmosphere
Related Mcqs:
- An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
A. 9.21
B. 4.605
C. 100
D. 0.001 - During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the___________________?
A. Gas film
B. Liquid film
C. Liquid-gas interface
D. None of these - The cooling effect in a cooling tower cannot be increased by_____________________?
A. Increasing the air velocity over the wet surfaces
B. Reducing the humidity of entering air
C. Lowering the barometric pressure
D. None of these - Raschig ring made of porcelain cannot be used for treating concentrated___________________?
A. Hydrochloric acid
B. Nitric acid
C. Alkalis
D. Sulphuric acid - Rotary dryers cannot handle _______________ materials ?
A. Free flowing
B. Dry
C. Sticky
D. Granular - Separation of two or more components of a liquid solution cannot be achieved by___________________?
A. Fractional crystallisation
B. Liquid extraction
C. Absorption
D. Evaporation - Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the ___________________ moisture ?
A. Unbound
B. Critical
C. Free
D. Bound - In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as ___________________ ?
A. KG = 1/KG + m/KL
B. 1/KG = 1/KG + m/KL
C. 1/KG = 1/KL + m/KG
D. KG = 1/KL + m/KG - The-relative volatility for separation of a non-ideal binary mixture by distillation should be ___________________?
A. 0
B. 1
C. > 1
D. < 1 - The binary diffusivity in gases does not depend upon the ___________________?
A. Pressure
B. Temperature
C. Nature of the components
D. None of these
