Which one is NOT applicable for combustion and respiration processes?

Both are chemical processes

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Energy change take place in both

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Oxygen gas is consumed

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Both processes are fast

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Solution

The correct option is D Both processes are fast
Cellular respiration resembles ordinary combustion or burning, in the break down of chemical bonds, use of oxygen, production of carbon dioxide and release of energy, but there are fundamental differences between the two processes.
Combustion releases a large amount of energy in a single step and most of it changes in to heat and some at times in to light and raising the temperature greatly. Cellular respiration releases energy in steps and each energy releasing step is coupled with the synthesis of ATP. Only a small amount of energy dissipates as heat. Respiration may be called as slow burning.

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Similar questions

Q. The table below gives the difference between respiration and combustion. One of the entries in the table is wrong. Which one is it?

	Respiration	Combustion
a.	Respiration is a slow process.	Combustion is relatively a fast process.
b.	Respiration takes place at the body temperature.	Combustion takes place at the ignition temperature of the fuel.
c.	Respiration produces CO₂ + H₂O and energy.	Combustion of hydrocarbons always produces only CO₂.
d.	Respiration takes place inside a cell.	Combustion takes place outside a cell.
e.	Respiration takes place at all times.	Combustion only takes place when a fuel or a combustible substance burns.

Question 11
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change–A) then it burns (Change–B). The following statements pertain to these changes. Choose the correct one.
Which of the processes is a chemical change?
(i) Process – A is a chemical change.
(ii) Process – B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.

Question 7

Which of the following is correct for respiration in plants?
(a) Respiration takes place only during daytime.
(b) Respiration take place only during night.
(c) Respiration takes place both during day and night.
(d) Respiration takes place only when plants are not making food.

The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A) then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.

(i) Process − A is a chemical change.

(ii) Process − B is a chemical change.

(iii) Both processes A and B are chemical changes.

(iv) None of these processes is a chemical change.

Q. Even though both are oxidation processes, combustion and respiration are different in many aspects. Explain those differences.

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