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CBSE Questions for Class 10 Chemistry Chemical Reactions And Equations Quiz 3 - MCQExams.com

AgNO3(aq)+NaCl(aq)AgCl(s)+NaNO3(aq)
Above reaction is :
  • precipitation reaction
  • double displacement reaction
  • combination reaction
  • redox reaction
1.0g of CaCO3 is taken in a test tube. On heating it over a flame, a colorless gas is evolved. The reaction is called:
  • decomposition reaction
  • displacement reaction
  • combination reaction 
  • double displacement reaction
2Mg+O22MgO
The above reaction is an example of :
  • decomposition reaction
  • displacement reaction
  • combination reaction
  • oxidation reaction
White silver chloride in sunlight turns to :
  • grey
  • yellow
  • green
  • red
Identify the balanced chemical equation from the following:
  • SiCl4+2H2OSiO2+4HCl
  • 2NaOH+H2O2Na2O2+2H2O
  • 6Be+3N23Be3N2
  • Al2O3+2NaOHNaAlO2+H2O
Double displacement reactions are :
  • Mg+CuSO4MgSO4+Cu
  • KOH+HNO3H2O+KNO3
  • Na2S+2HCI2NaCl+H2S
  • BaCl2+H2SO4BaSO4+2HCl
Which of the following is not a balanced equation?
  • Ca(OH)2+CO2CaCO3+H2O
  • Fe+CuSO4FeSO4+Cu
  • KClO4ΔKCl+2O2
  • Cu+2HNO3Cu(NO3)2+2NO+H2O
Identify the following reactions as endothermic or exothermic.
(i) 2NaHCO3+energyNa2CO3+H2O+CO2
(ii) 2Mg+O22MgO+energy
  • (i) Exothermic    (ii) Endothermic
  • (i) Endothermic  (ii) Exothermic
  • (i) Exothermic    (ii) Exothermic
  • (i) Endothermic   (ii) Endothermic
Balance the equation by providing the missing coefficients.
..C2H4(g)+..O2(g)..CO2(g)+..H2O(g)
  • 1, 3, 2, 2
  • 2, 1, 3, 2
  • 3, 1, 2, 2
  • 3, 2, 1, 1
Differentiate between an exothermic and an endothermic reaction.
  • Endothermic releases heat and exothermic absorbs energy
  • Exothermic releases heat and endothermic absorbs energy
  • Hydrogen gas is evolved in exothermic but not in endothermic
  • Hydrogen gas is evolved in endothermic but not in exothermic
What type of chemical reaction is it?
Calcium + oxygen Calcium oxide 
  • Displacement Reactions
  • Decomposition Reactions
  • Combination Reactions
  • Neutralization Reactions
(i) Reaction between calcium oxide and water is a ...... reaction.
(ii) Action of strong heat on mercuric oxide is a ...... reaction.
  • (i) decomposition (ii) combination
  • (i) combination (ii) combination
  • (i) combination (ii) decomposition
  • (i) decomposition (ii) decomposition
Which is the balanced equation for treatment of magnesium nitride with warm water?
  • Mg3N2+6H2O2NH3+3Mg(OH)2
  • 2Mg3N2+6H2O2NH3+6Mg(OH)2
  • Mg3N2+3H2ONH3+3Mg(OH)2
  • 3Mg3N2+6H2O2NH3+9Mg(OH)2
2HCl+Na2S2OxyNaCl+SO2+S+H2O

Find the value of x and y.
  • x=3,y=2
  • x=2,y=2
  • x=1,y=2
  • x=3,y=1
Correct balanced equation from the following reactions is:
  • Al4C3+12H2O4Al(OH)3+3CH4
  • Al4C3+2H2O2Al(OH)3+3CH4
  • 2Al4C3+12H2O4Al(OH)3+3CH4
  • Al4C3+16H2O4Al(OH)3+CH4
xFe+SFeSFeS+2HClFeCly+H2S
Find the value of x and y.
  • x=1,y=2
  • x=2,y=1
  • x=1,y=1
  • x=4,y=2
Select the reaction in which electricity is responsible for the chemical change.
  • Formation of lead(II) bromide 
  • Decomposition of water 
  • Hydrogenation of oils
  • None of these
Name the type of following chemical reaction.

PbO2+SO2PbSO4
  • Combination
  • Displacement
  • Double displacement
  • Neutralisation
On passing excess CO2 in aqueous solution of sodium carbonate, the substance obtained is :
  • NaOH
  • NaHCO3
  • Na2CO3.10H2O
  • Na2CO3.H2O
Correct balanced equation from the following reactions is :
  • K2Cr2O7+8H2SO4K2SO4+Cr2(SO4)3+3O2+8H2O
  • K2Cr2O7+8H2SO42K2SO4+Cr2(SO4)3+3O2+8H2O
  • 2K2Cr2O7+8H2SO42K2SO4+2Cr2(SO4)3+3O2+8H2O
  • 2K2Cr2O7+4H2SO42K2SO4+Cr2(SO4)3+3O2+8H2O
The correct balanced equation from the following is :
  • Zn+2KOH2K2ZnO2+H2
  • Zn+2KOHK2ZnO2+H2
  • Zn+KOHK2ZnO2+2H2
  • 2Zn+KOHK2ZnO2+H2
Iron articles rust readily whereas steel which is also mainly made of iron will not undergo corrosion.
  • True
  • False
The reaction between carbon and oxygen can be represented as;
C(s)+O2(g)CO2(g)+heat
In which of the following type(s), the above reaction can be classified?
I.   Combustion reaction
II.  Displacement reaction
III.  Endothermic reaction
IV. Combination reaction
  • (I) and (III)
  • (I), (III) and (IV)
  • (I) and (IV)
  • (I) only
Choose the correct balanced chemical reaction for the conversion of sulphur to sulphuric acid.
  • S+HNO3(hot and conc.)H2SO4+2H2O+NO2
  • S+6HNO3(hot and conc.)H2SO4+2H2O+6NO2
  • 2S+6HNO3(hot and conc.)2H2SO4+2H2O+6NO2
  • 2S+3HNO3(hot and conc.)2H2SO4+2H2O+3NO2
Name the type of following chemical reaction.

CaCO3CaO+CO2
  • Combination
  • Displacement
  • Decomposition
  • Synthesis
Select the wrong option about rancidity.
  • Aerial oxidation of fats
  • Aerial oxidation of oils
  • Oils left in refrigerator gets rancid
  • Chips exposed to air gets rancid
Which of the following pair will give displacement reaction?
  • NaCl solution and copper metal
  • MgCl2 solution and aluminium metal
  • FeSO4 solution and silver metal
  • AgNO3 solution and copper metal
What do you observe when H2S gas is passed through cadmium chloride solution? Name the type of reaction:
  • Synthesis
  • Displacement
  • Double displacement
  • Neutralisation
Name the type of following chemical reaction.
KNO3+H2SO4HNO3+KHSO4
  • Displacement Reaction
  • Double Displacement Reaction
  • Combination Reaction
  • Decomposition Reaction
Name the type of following chemical reaction.
NH4ClNH3+HCl
  • Synthesis
  • Combination
  • Displacement
  • Decomposition
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