Which is false about H202
  • Acts as oxidizing as well as reducing agent
  • Two OH bond lies on the same plane
  • Pale blue liquid
  • Can be oxidized by O3
Among CaH2,NH3,NaH and B2H6,which of the following are covalent hydrides
  • NH3 and B2H6
  • NaH and CaH2
  • NaH and NH3
  • CaH2 and B2H6
Water is oxidized to oxygen by:
  • Ozone
  • KMnO4
  • H2O2
  • F2
  • ClO2
The hybridization of oxygen atom in H2O2 is:
  • sp3d
  • sp
  • sp2
  • sp3
A: Dihydrogen is inert in natureB: It has high H-H bond enthalpy.
  • A is true but B is false
  • A is false but B is true
  • A and B are true but B is not the correct explanation of A.
  • A and B are true and B is correct explanation of A.
BeH2 and MgH2 are polymeric in structure.
  • True
  • False
Haber process is used to synthesize
  • Calcium hydroxide
  • Liquid nitrogen
  • Sulphur dioxide
  • None of these
Dihydrogen on the industrial scale is prepared by the____ reaction from petrochemicals
  • Electrolysis of water
  • Coal gasification
  • Water gas shift reaction
  • None of these
Industrially hydrogen peroxide is prepared by the auto oxidation of
  • 2-alkylanthraquinols
  • 4-alkylanthraquinols
  • Both a and b
Hydrogen peroxide acts as both oxidizing as well as reducing agent in alkaline media only.
  • True
  • False
A: Urea acts as a stabilizer B: dust can induce explosive decomposition of NH3
  • A and B are incorrect
  • A is only correct
  • B is only correct
  • A and B are correct but B is not the correct explanation of A.
Atomic no.of Hydrogen is
  • 1
  • 2
  • 3
  • 4
Hydrogen was first prepared by
  • Robert
  • Robert Boyle
  • Dalton
_____________________names / coined the term Hydrogen.
  • Robert Boyle
  • Dalton
  • Lavoisier
During electrolysis of water , hydrogen is collected at
  • anode
  • cathode
  • positive electrode
_______________________electrodes are used during electrolysis of water.
  • Graphite
  • platinum
  • Mercury
Nitric acid and hydrochloric acid are
  • weak electrolyte
  • strong electrolyte
  • none
During electrolysis of water oxygen is collected at
  • anode
  • cathode
  • none
Current enters the electrolyte through the
  • cathode
  • anode
  • none
Current leaves the electrolyte through the
  • cathode
  • anode
  • none
Granulated zinc is preferred over other metals because it
  • contains copper which acts a catalyst
  • contains iron
  • none
Passing electric current through aqueous solution/ molten state to form ions
  • electrolysis
  • electrolyte
  • non electrolyte
Nitric acid , sodium hydroxide are __________________electrolyte.
  • weak
  • strong
  • none
_________________________is connected to the positive terminal of the battery.
  • cathode
  • anode
  • none
Current leaves the electrolyte through the ________________.
  • Cathode
  • anode
  • none
During electrolysis anion migrate towards
  • cathode
  • anode
  • none
Contains impurity copper which acts as a catalyst.
  • Granulated zinc
  • Sodium
  • Aluminium
Nitric acid is an _________________________agent.
  • reducing
  • oxidising
  • both
______________________is formed when metal reacts with water.
  • hydroxide
  • metal hydroxide
  • hydride
Can't react with dilute acids to liberate hydrogen
  • Copper
  • Mercury
  • copper, mercury and silver
Hydrogen is colorless and
  • combustible
  • non combustible
  • supports combustion
Impure Hydrogen burns with
  • pop sound
  • blue flame
  • pop sound as it contains impurities.
Detonating mixture
  • hydrogen --oxygen mixture
  • an explosive
  • hydrogen --oxygen mixture and is explosive in nature
Reaction between hydrogen and nitrogen gives
  • ammonia
  • ammonium
  • ash
CuO+ H2--------------------> Cu + H2O , here H is a
  • oxidising agent
  • reducing agent
  • none
Hydrogen is replaced by _________________due to its inflammable nature.
  • Ne
  • He
  • Xe
Hydrogen is collected by the downward displacement of water during electrolysis of water
  • sparingly soluble in water
  • non soluble in water
  • none
Addition of hydrogen to vegetable oil to get vanaspati ghee in presence of catalyst
  • hydrogenation
  • catalytic hydrogenation
  • catalysis
PbO + H2 ----------------> Pb + H2O, in this reaction conversion of H2 to H2O is
  • redox reaction
  • reduction
  • oxidation
Commercially H is prepared by
  • Bosch process
  • Ostwald process
  • both
In formation of ammonia , molybdenum acts as a
  • catalyst
  • promoter
  • both
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