SSC CGL 2022111)What is the maximum permissible limit of turbidity in potable water as per the Bureau of Indian Standards (BIS)(IS -10500 ∶ 2012)?
5 NTU
SSC CGL 2022112)Decrease in which of the following factors leads to an increase in the rate of evaporation?
Humidity
SSC CGL 2022113)Solids like fats, grease and oil that float on top of liquid wastewater is called _________.
sludge
SSC CGL 2022114)In order to get clean drinking water disinfectant is used after filtration. Disinfectant, however, is NOT used for removing:
minerals
SSC CGL 2022115)Hot water can be a pollutant if it comes from:
(a) A hot spring (b) A power plant (c) An industry
Both (b) and (c)
SSC CGL 2022116)Colloidal systems – such as gum, starch, proteins, cellulose, agar, and gelatine – when placed in water, will absorb a large volume of water and swell up. These substances are called _________.
imbibants
SSC CGL 2022117)Chemical formula of quick lime is ______.
CaO
SSC CGL 2022118)Burning of coal is an example of ______.
combination reaction
SSC CGL 2022119)Which of the following is highest quality coal?
Anthracite
SSC CGL 2022120)Common name of the compound CaOCl2 is ________.
bleaching powder