Hydrogen CBSE Questions & Answers

Hydrogen

This is Chemistry Class 11 Hydrogen CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following statement is correct?
  • A
    Electron precise hydrides have tetrahedral geometries
    Correct
  • B
    All elements of group 16 form electron precise hydrides.
  • C
    Elements of group 15 form electron deficient hydrides.
  • D
    Electron rich hydrides can act as Lewis acids.
2
Which of the following statement is correct?
  • A
    Hydrides of group 14 are electron deficient hydrides.
  • B
    Hydrides of group 14 act as Lewis acids.
  • C
    Hydrides of group 13 act as Lewis acids.
    Correct
  • D
    Hydrides of group 13 act as Lewis bases.
3
Which of the following statement is correct?
  • A
    Ionic hydrides conduct electricity in solid state.
  • B
    Ionic hydrides are very good conductors of electricity in solid state.
  • C
    Metallic hydrides are deficient of hydrogen.
    Correct
  • D
    Metallic hydrides does not conduct heat and electricity.
4
Atomic and oxy hydrogen
  • A
    produce an electric arc
  • B
    can be used in cutting and welding
    Correct
  • C
    produced by dissociation of tritium
  • D
    generate low temperatures
5
Hydrogen is unique in behaviour because of its
  • A
    high ionization enthalpy
  • B
    nonmetallic characteristic
  • C
    low reactivity
  • D
    extremely small atomic size
    Correct
6
\({{\text{H}}_{\text{2}}}{\text{O}}\) can be reduced to dihydrogen by NaH.
  • A
    HOCl
  • B
    \({\text{BaS}}{{\text{O}}_{\text{4}}}\)
  • C
    NaH
    Correct
  • D
    PbS
7
\({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) as an antispectic is used in the name of
  • A
    bleacher
  • B
    perborate
  • C
    perhydrol.
    Correct
  • D
    percarbonate
8
Rocket fuel used in space research is
  • A
    Lithium hydride
  • B
    hydrogen peroxide
  • C
    \({{\text{H}}_{\text{2}}}{\text{O}}\)
  • D
    \({{\text{H}}_{\text{2}}}\)
    Correct
9
Stoichiometric compounds of dihydrogen are formed with
  • A
    s-block elements
    Correct
  • B
    p-block elements
  • C
    f-block elements
  • D
    d-block elements
10
One of the following is a non-stoichiometric hydride
  • A
    Metallic hydrides
    Correct
  • B
    Covalent hydrides
  • C
    molecular hydrides
  • D
    Ionic hydrides
11
Atoms like N, O and F in hydrides have lower boiling points than those of the subsequent group member hydrides. It is because of
  • A
    higher electropositivity of N, O and F
  • B
    the magnitude of covalent bonding in their hydrides
  • C
    shared electron pairs of N, O and F
  • D
    higher electronegativity of N, O and F
    Correct
12
The presence of lone pairs on atoms like N, O and F in hydrides results in
  • A
    association of molecules
    Correct
  • B
    covalent bonding in their hydrides
  • C
    behave as electron acceptors
  • D
    behave as Lewis acids
13
In winter season ice formed on the surface of a lake
  • A
    disturbs the ecological balance
  • B
    provides thermal insulation
    Correct
  • C
    kills the aquatic life in the lake
  • D
    lowers the temperature of the surrounding atmosphere
14
Aerobic conditions to sewage wastes is restored by
  • A
    Hydrogen
  • B
    hydrogen peroxide
    Correct
  • C
    By adding excess of water
  • D
    Aluminium hydride
15
One of the following is a bleaching agent
  • A
    hydrogen peroxide
    Correct
  • B
    By adding excess of water
  • C
    Aluminium hydride
  • D
    Hydrogen