281) Which acid is stored in batteries
Sulphuric acid
282) In a rechargeable cell what kind of energy is stored within the cell
Chemical energy
283) pH-scale ranges from
0–14
284) Disadvantage of using DDT as pesticide is
Not easily degradable in nature
285) Hydrochloric acid is also known as Muriatic acid
286) The chemical name of Hypo commonly used in Photography is– sodium Thiosulphate
287) Which silver salt is used for making film of photography?
Silver Bromide (Ag Br)
288) What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
No change will happen
289) What is the chemical composition of Heavy Water?
D2O
290) The amount of chlorine available in water after disinfection called as Residual chlorine
291) Alum stops bleeding in a minor cut because of– Coagulation
292) What is the meaning of Reader in wastewater treatment process?
Container
293) A Liquid is said to be boiled when its– Vapor pressure is equal to the surrounding pressure
294) The Physical method Commonly used to purify Sea water is– Desalination
295) Which metal is extracted from Sea water
Magnesium
296) When Chloroform is exposed to air, it undergoes oxidation releasing a toxic gas?
Phosgene
297) Nitrogen has Higher ionization energy than oxygen because in Nitrogen there is–Half Filled Stable configuration in 2p orb
298) The Gas dissolved in water that makes it basic is
Ammonia
299) Hygroscopic objects are those which instantly absorb– Water vapors
300) Cloud is a colloidal of
Water drop in a dispersion medium of air