Kinetic theory of matter and Gas Laws - Jamb Chemistry Past Questions and Answers

Question 21:

• JAMB 1985

A certain volume of gas at 298k is heated such that its volume and pressure are now four times the original values. What is the new temperature?

A. 18.6k
B. 100.0k
C. 298.0k
D. 1192.0k
E. 4768.0k

Question 22:

• JAMB 1986

10cm³ of hydrogen fluoride gas react with 5cm³ of dinitrogen difluoride gas (N²F₂) to form 10₃ of a single gas. Which of the following is the most likely equation of the reaction?

A. HF + N₂F₂ \(\to\) N₂HF₃
B. 2HF + N₂F₂ \(\to\) 2NHF₂
C. 2HF + N₂F₂ \(\to\) N₂H₂F₃
D. HF + 2N₂F₂ \(\to\) N₄HF₂

Question 23:

• JAMB 1986

The relationship between the velocity (U) of gas molecules and their relative molecular mass (M) is shown by the equation

A. U = (kM)\(\frac{1}{2}\)
B. U = (kM)²
C. U = \(\sqrt{\frac{k}{m}}\)
D. U = \(\frac{k}{m}\)

Question 24:

• JAMB 1987

Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?

A. Nitrogen
B. Chlorine
C. Oxygen
D. Sulphur (IV) oxide

Question 25:

• JAMB 1988

Which of the following statements is NOT correct?

A. The average kinetic energy of a gas is directly proportional to its temperature
B. At constant tempearture, the volume of a gas increases as the pressure increases
C. The pressure of a gas is inversely proportional to its volume
D. The temperature of a gas is directly proportional to its volume
E. The collisions of molecules with each other are inelastic