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Q.

Which of the following is the order of increasing densities of Air, Exhaust from chimneys, Honey, Water, Chalk, Cotton and Iron?


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a

Cotton< Air< water< Chalk< Honey< Iron< Exhaust from chimneys 

b

Air < Exhaust from chimneys < Cotton < Water < Honey < Chalk < Iron

c

Iron<Chalk <Honey<Water<Cotton <Exhaust from chimneys <Air

d

Cotton< Air< water< Exhaust from chimneys< Chalk< Honey< Iron

answer is A.

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Detailed Solution

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The order of increasing densities of Air, Exhaust from chimneys, Honey, Water, Chalk, Cotton and Iron is Air < Exhaust from chimneys < Cotton < Water < Honey < Chalk < Iron.
The above order is because air is mostly a mixture of comparatively light gases such as nitrogen and oxygen. Therefore, it has the lowest density. Chalk is a porous material with less tightly packed particles than honey, although it has a higher density. Iron is a very compact solid with extremely closely packed particles, resulting in a far higher density than chalk.
 
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