Q.1
Choose the RIGHT statement
  • in a redox reaction, there must be addition or removal of oxygen
  • the nature of redox reaction is the increase of element's oxidation number
  • if the oxidation number of an element changes, it is a redox reaction
  • an oxidising agent is oxidised in a redox reaction
Q.2
What is the species that lose electrons in a redox reaction?
  • oxidizing agent
  • reducing agent
  • is reduced
  • decreases in oxidation number
Q.3
Which particles DOES NOT have reducing power?
  • chloride ion
  • hydrogen ion
  • chlorine water
  • hydrogen gas
Q.4
The statements which are correct for an oxidising agent.
  • removes hydrogen
  • is reduced at the end of the reaction
  • accepts electrons
  • All Of above
Q.5
The statements which contain correct definitions of reduction
  • the removal of oxygen
  • the decrease in oxidation state/p>
  • the removal of electrons
  • Both A & B
Q.6
The chemical equation for the reaction between sodium hydride and water is NaH+H2O⟶NaOH+H2NaH+H_2O\longrightarrow NaOH+H_2NaH+H2​O⟶NaOH+H Water in the reaction is ...
  • an oxidising agent
  • a reducing agent
  • both an oxidising agent and a reducing agent
  • neither an oxidisding agent nor a reducing agent
Q.7
What type of reaction is the following? Zn(s) + 2Cu(NO3)2(aq) ---> 2Cu(s) + Zn(NO3)2(aq)
  • double displacement
  • single displacement
  • precipitation
  • neutralization
Q.8
2Pb(NO3) --> 2PbO + 4NO+ O2
  • Synthesis
  • Decomposition
  • Single Displacement
  • Combustion
Q.9
Is calcium oxidized or reduced in the following reaction? 2CaO--> 2Ca + O2
  • Oxidized
  • Reduced
Q.10
What is the oxidizing agent of this reaction?2Al(s) + 6H+(aq) −−−> 2Al(aq) + 3H2(g)
  • H2
  • Al3+
  • Al
  • H+
Q.11
What is oxidation number of Fe in FeO ?
  • +2
  • -2
  • 0
  • +1
Q.12
What is the reducing agent of this reaction?2Al(s) + 6H+(aq) −−−> 2Al(aq) + 3H2(g)
  • H+
  • Al3+
  • Al
  • H2
Q.13
What will be the result of the following: Br2 + NaF ->
  • bromine will replace Na
  • Na will replace Br
  • Br will replace F
  • no reaction will occur
Q.14
What is the reducing agent here: N2 + 3H2 --> 2NH3
  • N2
  • H2
  • NH3
  • 2NH3
Q.15
Substance that reduces another substance by losing electrons.
  • reducing agent
  • half-reaction
  • electronegative atom
  • oxidizing agent
Q.16
What is the oxidation number of Cr in Cr2O?
  • +14
  • +6
  • -6
  • -14
Q.17
What is the oxidation number of C in SrCO3?
  • -4
  • +2
  • -6
  • +4
Q.18
_____________ synthesis and decomposition reactions involve the transfer of electrons.
  • All
  • Most
  • No
  • Some
Q.19
What is oxidation number of H in H2O?
  • 0
  • -2
  • -1
  • +1
Q.20
What is the oxidation number of N in NO2-1?
  • -3
  • +4
  • -2
  • +3
0 h : 0 m : 1 s