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+H2O⟶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
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