IGCSE O Level Chemistry MCQs - Chapter 7

Energy from Chemicals Quiz Questions and Answers PDF - 7

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Energy from Chemicals Questions & Answers PDF Download: MCQ Quiz 7

MCQ 31: Burning of methane (CH₄) gives off heat and

A) carbon dioxide (gas) only

B) water (gas) only

C) hydrogen gas

D) carbon dioxide (gas) and water (gas)

MCQ 32: Burning of glucose produces heat and

A) carbon dioxide (gas) only

B) water (gas) only

C) oxygen (gas)

D) carbon dioxide (gas) and water (gas)

MCQ 33: Endothermic reactions take place when

A) energy given out in making bonds is less than the energy taken in for breaking bonds

B) energy given out in making bonds is more than the energy taken in for breaking bonds

C) energy given out in making bonds is equal to the energy taken in for breaking bonds

D) none of above

MCQ 34: Water with lesser oxygen is known to cause

A) water pollution only

B) disturbance in balance of life in river only

C) poisonous

D) water pollution and disturbance in balance of life in river

MCQ 35: Energy changes in a chemical reaction can be represented through

A) energy profile diagram

B) energy prolific graph

C) Sensors

D) data loggers

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