Energy from Chemicals Multiple Choice Questions (MCQ) PDF - 2

MCQ 6: On burning, hydrogen is changed into

1. hydroxides
2. water vapors
3. dilute acids
4. hydrogen gas

MCQ 7: An efficient source of electricity production is to

1. combine hydrogen and oxygen to form water
2. drive generators through steam
3. combine nitrogen with hydrogen
4. none of above

MCQ 8: Which one of these is an incorrect statement about an exothermic reaction?

1. it form a compound which gives out heat while being formed
2. it contains products that are very stable
3. it results in overall enthalpy change zero
4. it gives overall negative enthalpy

MCQ 9: Exothermic reactions take place when energy given out in making bonds is

1. less than the energy taken in for breaking bonds
2. more than the energy taken in for breaking bonds
3. equal to the energy taken in for breaking bonds
4. none of above

MCQ 10: Methane (CH₄) is better fuel than Coal gas because

1. it is endothermic
2. it is exothermic
3. it gives off more heat than coal gas
4. it requires very little oxygen to burn