Chemical Equations and Stoichiometry NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Chemical Equations and Stoichiometry MCQ Questions


13.
What is the coefficient of Al in the balanced equation: Al + O₂ → Al₂O₃?
A.
1
B.
2
C.
3
D.
4
😑 View Answer Rough Work Error
ANSWER :
C. 3
14.
Which of the following laws is based on the conservation of atoms?
A.
Avogadro's Law
B.
Law of Conservation of Mass
C.
Boyle’s Law
D.
Dalton’s Law
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ANSWER :
B. Law of Conservation of Mass
15.
In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, what is the mass ratio of CH₄ to CO₂?
A.
1:1
B.
1:2
C.
2:1
D.
3:1
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ANSWER :
A. 1:1
16.
What is the molar mass of Ca(OH)₂?
A.
58 g/mol
B.
74 g/mol
C.
40 g/mol
D.
90 g/mol
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ANSWER :
B. 74 g/mol
17.
Which of the following is an example of a decomposition reaction?
A.
NaCl → Na + Cl₂
B.
H₂O₂ → H₂O + O₂
C.
CO₂ → C + O₂
D.
KClO₃ → KCl + O₂
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ANSWER :
D. KClO₃ → KCl + O₂
18.
How many molecules of O₂ are produced when 2 moles of KClO₃ decompose?
A.
2 molecules
B.
3 molecules
C.
4 molecules
D.
6 molecules
😑 View Answer Rough Work Error
ANSWER :
B. 3 molecules