Rates of Chemical Reaction - Jamb Chemistry Past Questions and Answers

Question 41:

• JAMB 1999

Which is the temperature of a given mass of a gas initially at 0°C and 9 atm, if the pressure is reduced to 3 atm at constant volume?

A. 91K
B. 182K
C. 273K
D. 819K

Question 42:

• JAMB 1999

X + Y → Z. The rate equation for the chemical reaction above is ((-Δ[x])/Δt) = K[X]²[Y].
The overall order of the reaction is

A. 0.0
B. 1.0
C. 2.0
D. 3.09

Question 43:

• JAMB 2000

Potassium vapour burns with a

A. Blue flame
B. Brick-red flame
C. Violet flame
D. Golden-yellow flame

Question 44:

• JAMB 2000

Use the option above to answer this question. The graph that describes a zero order reaction is

A. A
B. B
C. C
D. D

Question 45:

• JAMB 2001

25cm³ of a gas X contains Z molecules at 15^oC and 75 mmHg. How many molecules will 25 cm³ of another gas Y contain at the same temperature and pressure?

A. 2 Y
B. 2 Z
C. Z
D. Y