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
Diborane \(\left( {{{\text{B}}_{\text{2}}}{{\text{H}}_{\text{6}}}} \right)\) is one of the following
  • A
    electron donor.
  • B
    electron acceptor
    Correct
  • C
    Electron-precise compound
  • D
    Lewis bases
2
Ammonia, \({\text{N}}{{\text{H}}_{\text{3}}}\) is an example of
  • A
    electron-precise compounds
  • B
    electron-rich hydrides
    Correct
  • C
    electron-deficient compounds
  • D
    electron acceptors
3
Many d-block and f-block elements form
  • A
    metallic hydride
    Correct
  • B
    saline hydride
  • C
    covalent hydride
  • D
    ionic hydride
4
Metal hydrides are used for hydrogen storage because
  • A
    they do not participate in any catalytic reactions
  • B
    large volumes of hydrogen occupies interstices in the metal lattice
    Correct
  • C
    they are stoichiometric
  • D
    they do not conduct heat and electricity
5
Presence of extensive hydrogen bonding between water molecules is responsible for
  • A
    liquid and vapour states
  • B
    vapour states
  • C
    solid and vapour states
  • D
    liquid and solid states
    Correct
6
presence of extensive hydrogen bonding between water molecules leads to
  • A
    low freezing point, high boiling point
  • B
    high freezing point, high boiling point
    Correct
  • C
    low heat of vaporisation and high heat of fusion
  • D
    high heat of vaporisation and low heat of fusion
7
For moderation of the climate and body temperature of living beings, the responsible factor is:
  • A
    high heat of fusion
  • B
    high specific heat,
  • C
    high heat of vaporisation
    Correct
  • D
    high surface tension
8
In the gas phase water is a bent molecule with a bond angle of
  • A
    \({\text{114}}.{{\text{5}}^0}\)
  • B
    \({\text{1}}0{\text{4}}.{{\text{5}}^0}\)
    Correct
  • C
    \({\text{1}}0{\text{9}}.{{\text{5}}^0}\)
  • D
    \({\text{124}}.{{\text{5}}^0}\)
9
Water behaves as an amphoteric substance because
  • A
    it has the ability to actl as a base
  • B
    it has the ability to oxidize as well as reduce
  • C
    it has the ability to act as an acid as well as a base
    Correct
  • D
    it has the ability to act as an acid
10
How many hydrogen-bonded water molecule(s) are associated in \({\text{CuSO4}}.{\text{5}}{{\text{H}}_{\text{2}}}{\text{O}}?\)
  • A
    5
  • B
    1.0
    Correct
  • C
    2
11
An ice cube floats on water because
  • A
    Density of ice is more than that of water
  • B
    Density of ice is equal to that of water
  • C
    Density of water is less than that of ice
  • D
    Density of ice is less than that of water
    Correct
12
\({\text{BaC}}{{\text{l}}_{\text{2}}}.{\text{2}}{{\text{H}}_{\text{2}}}{\text{O}}\) is an example of
  • A
    coordinated water
  • B
    interstitial water
    Correct
  • C
    hard water
  • D
    hydrogen-bonded water
13
Calgon is used in
  • A
    removing permanent hardness of water
    Correct
  • B
    cation exchange process
  • C
    removing permanent hardness of water
  • D
    anion exchange process
14
$H_2O_2$ as an antispectic is used in the name of
  • A
    perborate
  • B
    percarbonate
  • C
    bleacher
  • D
    perhydrol.
    Correct
15
Zeolite/permutit process is also called
  • A
    Clark’s method
  • B
    Calgon’s method:
  • C
    Ion-exchange method:
    Correct
  • D
    Synthetic resins method