CBSE Questions for Class 10 Chemistry Chemical Reactions And Equations Quiz 7 - MCQExams.com

Take 5 mL of sodium sulphate solution in a test tube and 5 mL of barium chloride solution in another test tube. Mix the two solutions slowly and leave the test tube undisturbed for some time. A white precipitate is formed after some time.
Which of the following statements is correct about the above reaction?
  • It is a double displacement reaction since exchange of ions occurs between the two reactants.
  • It is a combination reaction since barium ions combine with sulphate ions to give barium sulphate.
  • It is a displacement reaction since chloride ions are replaced by sulphate ions.
  • It is a neutralisation reaction since an acid reacts with alkali to give a salt.
$$2Pb \left( NO_{ 3 } \right)_{{2}{(s)}}$$ $$\overset{Heat}\longrightarrow$$  $$2 P b O_{( s )} + 4 N O _ {{ 2 }{(g)}} \uparrow + \  O _ {{ 2 }{(g)}} $$ , The above reaction is ...................
  • combination
  • decomposition
  • sublimation
  • both $$B$$ and $$C$$
Which of the following reactions are possible? 
i) $$Mg+CuSO_4 \rightarrow MgSO_4+Cu$$
ii) $$Ca+MgSO_4 \rightarrow CaSO_4+Mg$$
iii) $$Cu+ZnSO_4\rightarrow CuSO_4+Zn$$
iv) $$Fe+MgSO_4 \rightarrow FeSO_4+Mg$$ 
  • iii and iv only
  • i and iv only
  • ii and iii only
  • i and ii only
Which among the following processes are exothermic reactions?
  • A match stick burns
  • Ice melts
  • Molten metal solidifies
  • Sodium metal reacts with water
  • Rubbing alcohol evaporates
$$Zn(s)+PbCl_2(aq)\rightarrow Pb(s)+ZnCl_2(aq)$$
Find out which of the above component is getting oxidized.
  • Zn
  • Pb
  • Cl
  • $$Zn^+$$
Heating of ferrous sulphate crystals results in change in the colour of the crystals. This reaction is an example of:
  • Decomposition reaction
  • Combination reaction
  • Displacement reaction
  • Cannot be predicted
Observe the reaction:

$$CaCO_{3(s)} + 2NaOH_{(aq)} \rightarrow Na_{2}CO_{3(aq)} + Ca(OH)_{2(aq)}$$

Which of the following is a type of above reaction?
  • Displacement reaction
  • Double displacement reaction
  • Combination reaction
  • Decomposition reaction
The conversion of limestone to quicklime in presence of heat is a _______ reaction.
  • decomposition
  • displacement
  • combination
  • disproportionation
Identify the correct option for the following reaction:

$$2KClO_{3}(s) \longrightarrow  2KCl(s)+3O_{2}(g)$$
  • Endothermic & Double displacement reaction
  • Endothermic & Decomposition reaction
  • Endothermic & Reversible reaction
  • Endothermic & Precipitation reaction
During decomposition of an activated complex:
  • Energy is always released
  • energy is always absorbed
  • Energy does not chnage
  • None of the above
Which of the following is not a disproportionation reaction?
 $$I. NH_4NO_3 \xrightarrow{A} N_2O+H_2O  $$
$$ II. P_4 \xrightarrow {A} PH_3 +HPO_2$$
$$ III. PCl_5 \xrightarrow {A} PCl_3 +Cl_2 $$
$$IV. IO^{\ominus}_3 \rightarrow I_2 $$
  • $$ I, II $$
  • $$ I, III , IV $$
  • $$ II, V $$
  • $$ I , III $$
Observe the following reaction.
$$ NH_{3(g)} + HCl_{(g)} \rightarrow NH_4Cl_{(s) }$$
which of the following is a type of above reaction?
  • combination reaction
  • decomposition reaction
  • double displacement reaction
  • substitution reaction
$$ TiCl_4 +2Mg \rightarrow Ti +2MgCl_2 $$. Identify the reaction.
  • Decomposition reaction
  • Combustion
  • Combination reaction
  • Displacement reaction
Which of these is a combination reaction?
  • $$ 2CO_{(g)} + O_{2(g)} \rightarrow 2CO_{2(g)} $$
  • $$Mg_{(s)} + CuSO_{4(aq)} \rightarrow Cu_{(s)} + MgSO_{4(aq)} $$
  • $$ 2AgNO_{3(aq)} + Cu_{(s)} \rightarrow 2Ag_{(s)} + Cu(NO_3)_{2(aq)} $$
  • $$2HgO_{(s)} \rightarrow  2Hg_{(l)} + O_{2(g)} $$
  • All of these
  • None of these
Which of the following reaction is not exothermic? 
  • $$CaCO_3 \rightarrow CaO + CO_2$$
  • $$Fe + S \rightarrow FeS$$
  • $$NaOH + HCl \rightarrow NaCl + H_2O$$
  • $$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$$
Which of the following reactions will be comparatively the slowest?
  • Decomposition of urea in presence of urease enzyme
  • Formation of rust on iron in presence of inhibitors
  • The combination of $$ \mathrm{N}_{2} $$ and $$ \mathrm{O}_{2} $$ when lightening is there in the sky
  • The rate of reverse reaction in presence of catalyst.
Which of the following is a combination reaction.
  • $${ 2NH }_{ 3 }+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow ({ NH }_{ 4 }{ ) }_{ 2 }{ SO }_{ 4 }$$
  • $$\mathrm { NH } _ { 3 } + \mathrm { H } _ { 2 } \mathrm { O } \rightarrow \mathrm { NH } _ { 4 }\mathrm{OH}$$ 
  • $$2{ H }_{ 2 }+{ O }_{ 2 }\longrightarrow { 2H }_{ 2 }O$$
  • All the above
Which methods are suitable for preparing both zinc sulfate and copper(II) sulfate?
(1)Reacting the metal oxide with warm dilute aqueous sulfuric acid
(2) Reacting the metal with dilute aqueous sulfuric acid
(3)Reacting the metal carbonate with dilute aqueous sulfuric acid
  • 1,2 and 3
  • 1 and 2 only
  • 1 and 3 only
  • 2 and 3 only
Process of addition of oxygen is called oxidation.
  • True
  • False
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 10 Chemistry Quiz Questions and Answers