GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 059

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 059

581). An element has atomic weight 24 and equivalent weight 11.9. Its valency is
A). 1
B). 2
C). 3
D). 4

Answer: 2


   
582). Dry ice is
A). Solid NH3
B). Solid CO2
C). Solid CO
D). Solid NO2

Answer: Solid CO2



   
583). The gas which is responsible for the rise in the mean temperature of the world is
A). oxygen
B). carbon-di-oxide
C). nitrogen
D). sodium oxide

Answer: carbon-di-oxide


   
584). The Chemical properties of elements are related to their
A). atomic weight
B). atomic number
C). number of neutrons in the nucleus
D). valency

Answer: valency

   
585). Gobor gas is
A). Methane
B). Ethane
C). Butane
D). Acetylene

Answer: Methane



586). An amalgamation is a mixture of
A). mercury + water
B). mercury + oxygen
C). mercury + chlorine
D). mercury + metal

Answer: mercury + metal


   
587). A chemical used in photography is
A). sodium sulphate
B). sodium sulphite
C). sodium thiosulphate
D). sodium oxalate

Answer: sodium thiosulphate

   
588). The oxidizing agent in the following is
A). potassium chloride
B). potassium hydroxide
C). potassium carbonate
D). potassium dichromate

Answer: potassium dichromate

   
589). Alcohols contains
A). double bond
B). -OH group
C). triple bond
D). none of these

Answer: -OH group


   
590). Which of the following is an enzyme?
A). carbon
B). glucose
C). invertase
D). ethanol

Answer: invertase