Rates Of Chemical Reaction Jamb Chemistry Past Questions

Question 1

2SO_2(g) + O_2(g) \( \iff \)2SO_3(g)

\( \bigtriangleup H = -395.7kJmol^{-1} \)

In the reaction above, the concentration of 2SO_3(g) can be in creased by

jamb 2013

• A. decreasing the pressure
• B. decreasing the temperature
• C. the addition of catalyst
• D. increasing the temperature

Question 2

Which of the following factors will speed up the rate of evolution of carbon (iv) oxide in the reaction below?

2HCl + CaCO\(_3\) → CaCl\(_2\) + H\(_2\)O + CO\(_2\)

jamb 2019

• A. Increasing the concentration of the acid
• B. Increasing the surface area of CaCO\(_3\)
• C. A and B
• D. Reducing the concentration of the acid

Question 3

In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?

jamb 1981

• A. One atom of hydrogen reacts with two atoms of oxygen to give one molecule of water
• B. Two atoms of hydrogen react with two atoms of oxygen to give two molecules of water
• C. One molecule of oxygen reacts with one molecule of hydrogen to give two molecules of water
• D. One molecule of hydrogen reaccts with two molecules of oxygen to give three molecules of water
• E. One molecule of oxygen reacts with two molecules of hydrogen to give two molecules of water

Question 4

In the chemical reaction A + B \(\to\) C + D, more of D is formed?

jamb 1982

• A. if the concentrated of A is reduced
• B. if the concentrated of B is reduced
• C. if the concentrated of C is reduced
• D. if the concentration of C is increased
• E. if D is continuously removed from the reaction mixture

Question 5

When air is compressed?

jamb 1981

• A. its density decreases
• B. it solidifies
• C. its temperature decreases
• D. its temperature increases
• E. its temperature remains unchanged