Which of the following rot completely and do not smell ?

Left over food

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Broken glass

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Aluminium wrapper

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Polythene bags

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Solution

The correct option is A Left over food
The correct answer is 'leftover food'
For anything to rot completely, the microorganisms present in the environment should be able to breakdown the material by the use of their enzymes. Leftover food is easily degraded by these enzymes whereas broken glass, aluminium wrappers and polythene bags don't rot because these enzymes cannot degrade them(or the enzyme action on these substances is so slow that rotting is insignificant)
So the correct option is A.

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Similar questions

Write the names of five things you like and five things whose smell you do not like.

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Rose	Rotten Eggs
Petrol	Foul Breath
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Question 3

Which of the following activities does not reflect responsible behaviour with regard to waste disposal?

(a) Goods carried in paper bags or cloth bags.

(b) Waste collected in polythene bags for disposal.

(d) Making handicrafts with used up notebooks.

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