Related Questions

What is the pH of distilled water?
A 0
B 1
C 7
D 14
Hydrogen ion concentration in distilled water is
A 10-7
B 7 × 10-7
C 107
D 7 × 107
With increase in the temperature of pure (distilled) water, its
A POH decreases and pH increases
B POH and pH both 4ecreases
C PH and pOH both increases
D PH decreases and pOH increases
A 25 ml sample was diluted to 250ml with odourless distilled water so that the odour of the sample no longer perceivable. What was the Threshold odour number?
A 11
B 10
C 25
D 05
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
A Water, iron and air
B Iron, air and water
C Air, water and iron
D Iron, water and air
What is the name of the computer program that contains the distilled knowledge of an expert?
A Database management system
B Management information System
C Expert system
D Artificial intelligence
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)
A Less number of trays are required
B Composition of the residue remains unchanged
C More number of trays are required but the residue composition remains unchanged
D More number of trays are required and the residue composition is more dilute in methanol
Kerosene is distilled at
A 65° to 220°C
B 220° to 345°C
C 345° to 470°C
D 470° to 550°C
Petrol is distilled at
A 65° to 220°C
B 220° to 345°C
C 345° to 470°C
D 470° to 550°C
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.
A Continuous
B Steam
C Azerotropic
D None of these

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