Q.1
Which of the following ion has maximum oxidising power
  • ClO4-
  • BrO4-
  • IO4-
  • none of these
Q.2
What was the name of the combination of chlorine gas and carbon monoxide gas that wastimes more powerful than Chlorine?
  • Mustard
  • DiPhosgene
  • Phosgene
  • Chlorine 3
Q.3
ZnO + 2NaOH
  • Na2ZnO2 + H2O
  • Na2ZnO4 + H2O
  • Na2ZnO2 + 2H2O
  • Na2ZnO4 + 2H2O
Q.4
White phosphorous has characteristic
  • Onion like smell
  • Garlic like smell
  • Egg like smell
  • Fish like smell
Q.5
All elements in the Halogen family react violently because
  • Halogens have 1 valence electron that they give away readily to other elements in reactions
  • Halogens have 7 valence electrons which gives up massive energy when they give all seven to other elements
  • Halogens need only 1 electron which they will violently take from other elements
  • Halogens only react violently with water
Q.6
Conc HNO3 is yellow in colour due to presence of
  • NO2 dissolve in it
  • NO dissolve in it
  • N2O dissolve in it
  • N2O3 dissolve in it
Q.7
Chalcogens are
  • Group 15 elements
  • Group 16 elements
  • Group 17 elements
  • Group 18 elements
Q.8
Radioactive gas often found in basements. Formed from the radioactive decay of Radium.
  • Fluorine
  • Chlorine
  • Xenon
  • Radon
Q.9
Most reactive elemental gas.
  • Oxygen
  • Fluorine
  • Chlorine
  • Hydrogen
Q.10
Least reactive noble gas.
  • Xenon
  • Radon
  • Krpton
  • Helium
Q.11
Glows red/orange when electricity is passed through it.
  • Helium
  • Neon
  • Argon
  • Oxgyen
Q.12
Balance the ionic equation:Cl2 + KBr → Br+ KCl
  • Cl2 + 2KBr → Br2 + 2KCl
  • Cl2 + 2KBr → Br2 + KCl
  • Cl2 + KBr → Br2 + 2KCl
Q.13
How many valence electrons are in the element iodine?
  • 1
  • 4
  • 7
  • 8
Q.14
Name most metallic element in Group 14
  • Lead
  • Carbon
  • Silicon
  • Germanium
Q.15
States of groupelements are ...
  • fluorine - liquid, chlorine - gas, Bromine liquid, iodine solid
  • fluorine - gas, chlorine - gas, Bromine liquid, iodine gas
  • fluorine - gas, chlorine - gas, Bromine liquid, iodine solid
  • fluorine - gas, chlorine - gas, Bromine gas, iodine solid
Q.16
What is the oxidation number of Oxygen in OF2?
  • +2
  • 0
  • +1
  • -2
Q.17
Correct order of boiling point is
  • H2O < H2S < H2Se < H2Te
  • H2O < H2Se < H2Te < H2S
  • H2Te < H2O < H2S < H2Se
  • H2S < H2Se < H2Te < H2O
Q.18
The molecular shape of SF4 is
  • square planar
  • see-saw
  • tetrahedral
  • bent 'T' shape
Q.19
Hydrogen bonding does NOT play any role in the boiling point of
  • NH3
  • H2O
  • HF
  • HI
Q.20
Silicones are inert and non-toxic because silicones
  • are inorganic polymers
  • are saturated molecules
  • have many hydrophobic groups
  • have strong Si—O and Si—C bonds
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