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Energy Changes H Accompanying Physical And Chemical Changes - Chemistry Jamb Past Questions and Answers

Chemistry Questions And Answers On Energy Changes H Accompanying Physical And Chemical Changes
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Chemistry Jamb Past Questions


Questions and Answers on Energy changes ∆H accompanying physical and chemical changes

Question 1 :



When heat is absorbed during a chemical reaction, the reaction is said to be

A. Thermodynamic
B. Exothermic
C. Isothermal
D. Endothermic
E. Thermostatic


Question 2 :



Consider the following exothermic reaction

2SO2(g) + I2(g) 2SO3(g)

If the temperature of the reaction is reduced from to an no other change takes place, then

A. The reaction rate increases
B. Concentration of SO3 decreases
C. Concentration of SO3 increases
D. SO2gas becomes unreactive
E. I3 gas becomes unreactive


Question 3 :



When heat is absorbed during a chemical reaction, the reaction is said to be

A. Thermodynamic
B. Exothermic
C. Isothermal
D. Endothermic
E. Thermostatic


Question 4 :



Consider the following exothermic reaction
2SO2(g) + O2(g) ↔ 2SO3(g)
If the temperature of the reaction is reduced from 800°C to 500°C, an no other change takes place, then

A. The reaction rate increases
B. Concentration of SO3 decreases
C. Concentration of SO3 increases
D. SO2 gas becomes unreactive
E. O3 gas becomes unreactive




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