MCQ on Decomposition Reaction: Chemistry is considered to be the most scoring subject in NEET JEE Exam. As it is one of the easiest scoring subjects, it is often ignored and undermined a subject. But if you want to get an edge over others, here is a tip, master NEET/JEE Chemistry concepts. Chemistry demands the attention of students in understanding reactions and concrete basic understanding but once done it only gets easier from there. Mastering NCERT syllabus for NEET/JEE Chemistry should be topping your list of to-do for chemistry.

In this post we are providing you MCQ on Decomposition Reaction, which will be beneficial for you in upcoming NEET, JEE, Medical and Engineering Exams.

MCQ on Decomposition Reaction

Q1. The correct expression for decomposition of silver chloride to silver and chlorine is ______.
a) AgCl_2(s) → Ag_(s) + 2Cl_(g)
b) AgCl_2(s) → Ag_(s) + Cl_2(g)
c) AgCl_(s) → Ag_(s) + Cl_(g)
d) 2AgCl_(s)→ 2Ag_(s) + Cl_2(g)

Q2. The reaction 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂ is a type of _______reaction.
a) displacement
b) decomposition
c) double decomposition
d) none of the above

Q3. How many moles of sodium carbonate is formed on decomposition of 0.2 moles of sodium bicarbonate?
a) 0.1
b) 0.2
c) 0.05
d) 0.025

Q4. Name the reaction where two compounds exchange their atoms to form new compounds.
a) displacement
b) decomposition
c) double displacement
d) synthesis

Q5. CO₂ obtained by the complete decomposition of 20 g CaCO₃ at STP is ______.
a) 2.24 l
b) 4.48 l
c) 6.72 l
d) 8.96 l

Q6. Ferrous sulphate on heating gives reddish-brown residue of ferric oxide. This is due to ______.
a) combination
b) displacement
c) decomposition
d) None of the above

Q7. Find out the volume of CO₂ liberated after heating 9.85 g of BaCO₃ at STP.
a) 1.12 l
b) 2.12 l
c) 2.06 l
d) 4.84 l

Q8. The decomposition of silver chloride occurs by ______.
a) heat
b) water
c) electricity
d) sunlight

Q9. Decomposition of hydrogen peroxide to give H₂O + O₂ is an example of ______.
a) reduction
b) oxidation
c) Both of these
d) None of these

Q10. On passing current to an acidified water we get hydrogen and oxygen. This is a type of ______.
a) electrolysis
b) oxidation reaction
c) thermal decomposition
d) none of the above

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