Related Questions

For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
A Sodium chloride
B Sodium carbonate monohydrate
C Anhydrous sodium sulphate
D Hypo
Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method
A Is more accurate in finding the number of equilibrium stages
B Accounts for the enthalpy changes in the process
C Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method
D All of the above
Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in
A Increased COP
B Same COP
C Decreased COP
D Increased or decreased COP ; depending upon the type of refrigerant
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will
A Increase
B Decrease
C May increase or decrease depending on the type of refrigerant used
D Remain unaffected
In evaporators, lowering the feed temperature
A Increases the heating area required
B Reduces the economy
C Both A and B
D Decreases the heating area required
A tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. If 2500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?
A 1.25%
B 3.75%
C 6.25%
D 6.67%
The value of Sodium Absorption Ratio for high sodium water lies between
A 0 to 10
B 10 to 18
C 18 to 26
D 26 to 34
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
A Carbonate
B Phosphate
C Bicarbonate
D Silicate
The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a 'tanks in series model' comprising of 'm' tanks is equal to
A m
B $$\frac{1}{{\text{m}}}$$
C $$\sqrt {\text{m}} $$
D m2
During a sale, a salesperson was putting a new price tag on each item. On one shirt, he accidentally raised the price by 15% instead of lowering the price by 15%. As a result the price on the tag was Tk. 60 higher than the price that would have been the discounted price. What was the original price of the shirt?
A Tk. 220
B Tk. 250
C Tk. 150
D Tk. 200

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