GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 078

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 078

771). Hardness of water is due to the soluble salts of
A). sodium and potassium
B). potassium and calcium
C). sodium and magnesium
D). calcium and magnesium

Answer: calcium and magnesium


   
772). The gas used for the artificial ripening of green fruits is
A). acetylene
B). ethylene
C). ethane
D). methane

Answer: ethylene


   
773). Which of the following metals pollutes the air of a city having automobiles?
A). cadmium
B). chromium
C). lead
D). copper

Answer: lead

   
774). The pH of a neutral solution is
A). 0
B). 1
C). 7
D). 9

Answer: 7


   
775). Hydrogen, chloride gas is a/an
A). electrovalent compound
B). covalent compound
C). complex molecule
D). bondless compound

Answer: covalent compound



776). Name the Poison present in tobacco
A). Conline
B). Nicotine
C). Theobromine
D). Narcotine

Answer: Nicotine


   
777). Which one of the following iron alloys cracks easily?
A). stainless steel
B). cast iron
C). wrought iron
D). mild steel

Answer: cast iron


   
778). The isomer of glucose is
A). fructose
B). formaldehyde
C). dimethyl ether
D). sugar

Answer: fructose

   
779). Tempered steel is
A). coins
B). rails
C). chisels
D). electric wires

Answer: chisels


   
780). The chemical used in match industry is
A). red phosphorous
B). white phosphorous
C). bone ash
D). coke

Answer: red phosphorous