Chemistry Practice Test – Energy Changes In Chemical Reactions (Questions with Answers and Explanations)

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Chemistry Practice Test – Energy Changes In Chemical Reactions (Questions with Answers and Explanations)

Hello and Welcome to Chemistry Practice Test - Energy Changes In Chemical Reactions

  1. You are to attempt 5 random objectives questions ONLY.
  2. Supply Your Full Name and Location in the text box below and begin immediately.
  3. You can attempt as many times as possible
1. 


If the energy change for a reaction is zero, it means _____ (JAMB 2019)

A. the reaction is spontaneous
B. the reaction is endothermic
C. the reaction is exothermic
D. the reaction is at equilibrium

2. 


In which of the following situation is ΔH zero? (JAMB 2015)

A. Mixing of gases at constant volume
B. Burning of magnesium in air
C. Burning of hydrogen gas in oxygen
D. Mixing of acid and base

3. 


The degree of randomness increases from ______ (JAMB 2015)

A. gas to solid   B. gas to liquid   C. liquid to solid   D. solid to gas

4. 



The ΔH for the reaction above is _______ (JAMB 2018)

A. -300 kJmol-1   B. -150 kJmol-1    C. +150 kJmol-1    D. +300 kJmol-1

5. 


In an equilibrium reaction, which of the following conditions indicates that maximum yield of the product will be obtained? (JAMB 2014)

A. Equilibrium constant is less than zero
B. Equilibrium constant is very large
C. ΔH - TΔS = 0
D. ΔH > TΔS

 

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