Q.1
Amongst H2O,H2S,H2Se and H2Te, the one with the highest boiling point is -
  • H2O, because of hydrogen bonding
  • H2Te, because of higher molecular weight
  • H2S, because of hydrogen bonding
  • H2Se, because of lower molecular weight
Q.2
Zeolite used to soften hardness of water is, hydrated
  • Zinc aluminium borate
  • Sodium aluminium silicate
  • Calcium aluminium silicate
  • Lithium aluminium hydride
Q.3
Granulated zinc is preferred over other metals because it
  • contains copper which acts a catalyst
  • contains iron
  • none
  • None of these
Q.4
Hydrogen was first prepared by
  • Robert
  • Robert Boyle
  • Dalton
  • None of these
Q.5
_____________________names / coined the term Hydrogen.
  • Robert Boyle
  • Dalton
  • Lavoisier
  • None of these
Q.6
_______________________electrodes are used during electrolysis of water.
  • Graphite
  • platinum
  • Mercury
  • Both A & B
Q.7
Nitric acid and hydrochloric acid are
  • weak electrolyte
  • strong electrolyte
  • none
  • Both A & B
Q.8
Current enters the electrolyte through the
  • cathode
  • anode
  • none
Q.9
During electrolysis anion migrate towards
  • cathode
  • anode
  • none
  • Both A & B
Q.10
Nitric acid , sodium hydroxide are __________________electrolyte.
  • weak
  • strong
  • none
  • Both A & B
Q.11
_________________________is connected to the positive terminal of the battery.
  • cathode
  • anode
  • none
  • Both A & B
Q.12
Current leaves the electrolyte through the ________________.
  • Cathode
  • anode
  • none
  • Both A & B
Q.13
Contains impurity copper which acts as a catalyst.
  • Granulated zinc
  • Sodium
  • Aluminium
  • All of above
Q.14
Nitric acid is an _________________________agent.
  • reducing
  • oxidising
  • both
  • None of these
Q.15
______________________is formed when metal reacts with water.
  • hydroxide
  • metal hydroxide
  • hydride
  • All of above
Q.16
Can't react with dilute acids to liberate hydrogen
  • Copper
  • Mercury
  • copper, mercury and silver
Q.17
Hydrogen is colorless and
  • combustible
  • non combustible
  • supports combustion
  • Both A & B
Q.18
Detonating mixture
  • hydrogen --oxygen mixture
  • an explosive
  • hydrogen --oxygen mixture and is explosive in nature
  • None of these
Q.19
Impure Hydrogen burns with
  • pop sound
  • blue flame
  • pop sound as it contains impurities.
  • All of above
Q.20
Commercially H is prepared by
  • Bosch process
  • Ostwald process
  • both
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