According to Boyle's law, at constant temperature, the pressure of a gas is inversely proportional to its: MCQ with Answer and Explanation

According to Boyle's law, at constant temperature, the pressure of a gas is inversely proportional to its:
A. Volume
B. Mass
C. Density
D. Temperature
Answer: Option A
Solution (By JKExamLibrary)
Boyle's law: P ∝ 1/V or PV = constant at constant T and n. So if volume increases, pressure decreases. This is because gas molecules have more space and hit the walls less frequently. An example is a syringe: pulling the plunger increases volume, decreases pressure.

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Practice More chemistry Questions

Question #1
Which of the following reactions is NOT a redox reaction?
A. CH₄ + 2O₂ → CO₂ + 2H₂O
B. 2Na + Cl₂ → 2NaCl
C. Zn + CuSO₄ → ZnSO₄ + Cu
D. CaCO₃ → CaO + CO₂

Correct Answer: Option D


Explanation:
In CaCO₃ decomposition, the oxidation states are: Ca (+2), C (+4), O (-2) in both reactant and products, so no change—not a redox reaction. The others involve changes: Zn(0→+2), Cu(+2→0) in B; Na(0→+1), Cl(0→-1) in C; C(-4→+4), O(0→-2) in D. Redox requires change in oxidation numbers.

This question belongs to: Science chemistry
Question #2
Faraday's second law of electrolysis relates the masses of different substances deposited to their:
A. Molecular masses
B. Atomic masses
C. Densities
D. Equivalent weights

Correct Answer: Option D


Explanation:
Faraday's second law: When the same quantity of electricity is passed through different electrolytes, the masses of substances deposited are proportional to their equivalent weights (E). m₁/m₂ = E₁/E₂. Equivalent weight = atomic mass / valency (or change in oxidation number). This law is used to calculate the amount of metal deposited or gas liberated. Electrolysis is quantitative.

This question belongs to: Science chemistry
Question #3
The reaction of an alcohol with a carboxylic acid in the presence of an acid catalyst to form an ester is called:
A. Fermentation
B. Saponification
C. Hydrogenation
D. Esterification

Correct Answer: Option D


Explanation:
Esterification is the chemical reaction where a carboxylic acid reacts with an alcohol in the presence of a strong acid catalyst (like conc. H₂SO₄) to produce an ester and water. Saponification is the reverse process, involving the alkaline hydrolysis of esters to form soap and glycerol.

This question belongs to: Science chemistry