Distillation is a method of purification that removes:
A. Suspended solids
B. Only color
C. Dissolved gases and volatile impurities
D. All microorganisms
Answer: Option C
Solution (By JKSSB Mock Tests)
Distillation involves boiling and condensation, separating non-volatile impurities (salts) and some volatile impurities. It can also kill microorganisms but boiling already does; distillation purifies further.
Explanation:
Biogas is produced from anaerobic digestion of organic waste (cow dung, agricultural residue) and is renewable. Mainly methane and CO₂. Coal, petroleum, and natural gas are fossil fuels formed over millions of years, non-renewable. Biogas plants generate clean fuel and also produce enriched manure. Charcoal is also not a fossil fuel; it's from wood pyrolysis.
Explanation:
Salivary amylase (ptyalin) hydrolyzes starch into maltose in the mouth. Pepsin digests protein in stomach; lipase digests fats; trypsin is pancreatic enzyme for proteins.
Explanation:
Cracking is a petrochemical process where complex, heavy hydrocarbon molecules are broken down (cleaved) into lighter, more valuable molecules like gasoline and alkenes. This is achieved by applying high temperatures and pressures, often in the presence of a catalyst (catalytic cracking).
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