GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 080

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 080

791). The element having only proton in the nucleus is
A). Hydrogen
B). Deuterium
C). Tritium
D). Helium

Answer: Hydrogen


   
792). pH of water is
A). 4
B). 7
C). 12
D). 0

Answer: 7


   
793). 'The sides of a match box contains
A). red phosphorus
B). white phosphorus
C). phosphorus pentoxide
D). none of these

Answer: red phosphorus


   
794). The acid which etches glass is
A). nitric acid
B). sulphuric acid
C). hydrofluoric acid
D). hypochlorous acid

Answer: hydrofluoric acid


   
795). Helium is preferred to hydrogen in airships because it
A). has greater lifting power
B). is less dense
C). cheaper
D). does not form explosive mixture with air

Answer: does not form explosive mixture with air



796). Which of the following has the smell of garlic?
A). white phosphorus
B). red phosphorus
C). phosphorus chloride
D). phosphine

Answer: white phosphorus


   
797). A common nitrogenous fertilizer is
A). urea
B). super phosphate
C). triple phosphate
D). potassium chloride

Answer: urea


   
798). Which element is metalloid in the following?
A). copper
B). arsenic
C). aluminium
D). gold

Answer: arsenic

   
799). Highest ionisation energies are found in
A). inert gases
B). alkali metals
C). transition metals
D). halogens

Answer: halogens


   
800). The bonds present in acetylene are
A). 3pi, 2 sigma bonds
B). 2pi, 3 sigma bonds
C). 4pi, 1 sigma bonds
D). 1pi, 4 sigma bonds

Answer: 2pi, 3 sigma bonds