GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 110

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 110

1091). The metal that is extracted from sea water is
A). sodium
B). calcium
C). magnesium
D). tin

Answer: sodium

   
1092). The amount of chromium in stainless steel is
A). 0.5
B). 0.25
C). 0.14
D). 0.02

Answer: 0.14

   
1093). Which of the following elements occurs free state in nature?
A). Iron
B). Cobalt
C). Platinum
D). Nickel

Answer: Platinum

   
1094). Which of the following gases comes under 'Noble gases'?
A). Nitrogen
B). Oxygen .
C). Neon
D). Hvdrogen

Answer: Neon

   
1095). Which is used as a fire extinguisher?
A). Oxygen
B). Carbon dioxide
C). Carbon monoxide
D). Water gas

Answer: Carbon dioxide



1096). The ozone layer of the earth is useful for living beings because
A). it serves as the source of oxygen
B). it maintains nitrogen cycle
C). it maintains temperature
D). it prevents excessive ultraviolet rays .

Answer: it prevents excessive ultraviolet rays .


   
1097). The speed of ultra centrifuges concentrate viruses in solution is
A). 5×10^-5 rpm
B). 5×10^6 rpm
C). 5×10^5 rpm
D). 5×10^-6 rpm

Answer: 5×10^5 rpm


   
1098). Rectified spirit is;
A). 90%'ethanol and 10% water
B). 80% ethanol and 20% water
C). 95.6% ethanol and 4.4% water
D). 96.5 ethanol and 3.5% water

Answer: 95.6% ethanol and 4.4% water


   
1099). Stainless steel contains
A). copper, nickel, chromium
B). copper, tungsten, chromium
C). iron, nickel, chromium
D). iron, tungsten, chromium

Answer: iron, nickel, chromium

   
1100). Oxides of metals are generally
A). acidic
B). netural
C). basic
D). amphoteric

Answer: basic