Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

Consider the following statements in respect of a vapour-absorption refrigeration cycle: 1. The absorption refrigeration cycle is generally used when waste heat is a available from an existing source or when free energy like solar energy is to be used. 2. There are no moving parts in the absorption refrigeration plant except a small liquid pump. 3 the value of the coefficient of performance is nearly the same in both vapour-absorption and vapour-compression refrigeration plants. Which of the above statements are correct?
Which of the following statements about physical absorption are correct? Statement 1: Example for physical absorption is the absorption of carbon dioxide into water. Statement 2: Polar interactions between water and the molecules of the solid play an important role in physical absorption.
Consider the following statements regarding vapour absorption systems in the field of refrigeration: 1. In ammonia-water absorption system, ammonia is the refrigerant. 2. In water-lithium bromide system, water is the refrigerant. 3. Ammonia-water absorption reaction is endothermic. 4. The amount of ammonia absorbed by water is inversely proportional to the temperature of ammonia. Which of the above statements are correct?
A sample of polystyrene is warmed under reflux in concentrated nitric acid and the clear mixture is poured in water to yield a X coloured precipitate. This precipitate is then extracted with ether and then with NaOH solution followed by washing with water in each extraction. The nitro compounds from the combined final aqueous extract and alkaline extract using concentrated HCl and zinc. The final solution after being diazotized and then cooled is poured into excess of alkaline naphthol to give Y coloured solution. What are the colours X and Y?
Which of the following statements about Soxhlet apparatus are correct? Statement 1: Soxhlet apparatus is mainly used for extracting oils. Statement 2: It allows for unmonitored and unmanaged operation.
The coolest used in 1 hr. apparatus of proto mark V apparatus.
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
Apparatus that produces two or more streams of different composition from the fluid entering the apparatus is called
‘To turn off the apparatus’ is a ___________ He forgot how to turn off the apparatus.
Statement 1: Packed towers are used for physical absorption. Statement 2: Agitated vessels are used for physical absorption.