JEE Chemistry - Hydrogen

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Question - 1

Hydrogen gas is generally prepared by the

  • A reaction of granulated zinc with dilute H2SO4
  • B reaction of zinc with conc. H2SO4
  • C reaction of pure zinc with dil. H2SO4
  • D action of steam on red hot coke.

Question - 2

Hydrogen peroxide is used as

  • A an oxidizing agent
  • B a reducing agent
  • C a bleaching agent
  • D all of the above

Question - 3

Water may be softened using

  • A sodium aluminium silicate
  • B Graham's salt
  • C an ion exchange resin
  • D trisodium phosphate

Question - 4

On treatment of hard water with zeolite, sodium ions get exchanged with

  • A Ca2+ ions
  • B Mg2+ ions
  • C H+ ions
  • D OH-

Question - 5

Calgon, which is used as a water softener, has the formula

  • A Na4 [Na2 (PO3)6]
  • B Na2 [Na4(PO3)6]
  • C Na2 [Na4(PO4)5]
  • D Na2 [Na2 (PO4)6]

Question - 6

The higher density of water than that of ice is due to

  • A dipole-dipole interaction
  • B dipole-induced dipole interaction
  • C hydrogen bonding
  • D all of these

Question - 7

Hydrogen is obtained as a by-product in the

  • A electrolysis of water
  • B manufacture of caustic soda
  • C Bosch process
  • D Lane process

Question - 8

Zeolite is

  • A hydrated sodium aluminium silicate - Na2Al2Si2O8.xH2O
  • B hydrated ferric oxide
  • C sodium hexametaphosphate
  • D sodium tetraborate

Question - 9

Water undergoes self-ionization to a small extent to give

  • A H+ and OH-
  • B OH+ and H-
  • C H3O+ and OH-
  • D none of the above

Question - 10

The decomposition of H2O2 is retarded by

  • A acetanilide
  • B glycerol
  • C sodium bicarbonate
  • D oxalic acid