What is the role of Ultraviolet Radiation (UV) in the water purification systems?
1. It inactivates/kills the harmful microorganisms in water
2. It removes all the undesirable odours from the water
Select the correct answer;-
(a) 1 only (b) 1 and 2 both
(c) 2 only (d) Neither 1 and nor 2
Activated carbon or activated charcoal is commonly used to remove undesirable odors from water. Activated carbon is a highly porous material that can effectively adsorb organic compounds that cause odor, such as hydrogen sulfide and volatile organic compounds (VOCs), as well as other impurities that may be present in the water.
Change the following into indirect speech
He said to Ramesh, “Lend me your physics book”.
When his company’s stock price dropped under a dollar, the CEO decided to ___________ his title and leave the firm.
Which among the following is the primary function of a scanner?
The ratio of age of A and B after 8 years is 4:5 respectively. The ratio of age of A and C 6 years ago is 3:4 respectively. If the present average age o...
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Choose the word with correct spelling.
Answer the following question based on the direction given below. If 'A#B' means 'A is father of B'. 'A@B' means 'A is brother of B'. 'A$B' means 'A is ...
If 'TOGETHER' is coded as 7 and 'BEAUTIFUL' as 8, then what is the code number for the word 'MONOPOLY'?
Sum of squares of three consecutive numbers is 974. Find the sum of first and third number.