GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 045

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 045

441). Non-stick kitchenwares are coated with
A). PVC
B). Graphite
C). Teflon
D). Silicon

Answer: Teflon


  
442). Gobar gas mainly contains
A). carbon-di oxide
B). carbon monoxide
C). hydrogen sulphide
D). methane

Answer: methane


  
443). The chief constituent of vinegar is
A). formic acid
B). acetic acid
C). salicylic acid
D). oxalic acid

Answer: acetic acid


  
444). The fibre least prone to catch fire is
A). nylon
B). polyester
C). cotton
D). terylene

Answer: cotton


  
445). Setting of plaster of paris involves
A). dehydration process
B). hydration to form other hydrates
C). oxidation process
D). reduction process

Answer: hydration to form other hydrates



446). The chemical name for the compound having formula NaOH is
A). caustic soda
B). caustic potash
C). soda ash
D). sodium hydroxide

Answer: sodium hydroxide


  
447). Helium gas is filled in balloons because
A). its atomic number is 2
B). it is lighter than air
C). it is one of the constituents of water
D). it is a noble gas

Answer: it is lighter than air


  
448). Gas law was given by
A). Boyle
B). Ostwald
C). Arrhenius
D). Faraday

Answer: Boyle

  
449). Consider the following statements:
I. Amalgams are alloys containing Hg.
II. Amalgams are always in liquid state.
III. Amalgams are highly coloured alloys.
IV. Amalgams are alloys which resist corrosion
Of the statements:
A). I alone is correct
B). I and II are correct
C). I, II and III are correct
D). All are correct

Answer: All are correct


  
450). What happens to the equivalent conductance of an electrolyte on dilution?
A). decreases
B). increases
C). remains constant
D). may increase or decrease depending on the electrolyte

Answer: may increase or decrease depending on the electrolyte