Kenneth wanted to interact more with John and Sam and hence decided to ask more about the composition of air. He asked John and Sam ' what is the exact composition of air?' Sam being the man with information took the liberty to explain him that the composition of air is not fixed everywhere and it varies from place to place but we can have a rough estimate of its composition. Sam further went ahead to make the following table.

Sam further went on to match the components in column I with the percentage by volume in column II as per the composition of air. Which of the following options are correct for the above table

(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

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(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

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(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

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(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

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Solution

The correct option is D
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Air is a mixture of gases, water vapour and dust particles. Nitrogen and oxygen are the major components of air. Nitrogen occupies 78% of the air. Oxygen occupies 21% of the air. Carbon dioxide is present in traces and is approximately 0.03 % the rest are other gases which make 0.97 % of the total air by volume.

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Similar questions

John wanted to know about the composition of air. He asked Sam to explain it to him whether air is composed of a single component or more than one component. To reply this query Sam made the following statements:

Statement I: Air is a mixture of gases, water vapour and dust particles.

Statement II: Air is composed of only one gas that is nitrogen.

Statement III: Air is composed of two gases, nitrogen and oxygen only.

Statement IV: Air is made up of more than one components.

Which of the above statement(s) are correct?

Sam asked Kenneth 'Now that you know about the composition of air, can you tell us (Sam and John) why the composition of air varies from place to place?' Kenneth began to think as he had no answer for this question. But having developed a reasonable idea about air and its properties John was able to connect the dots and gave a quick and loud answer.

What was John's answer?

Match the components in column I with the percentage by volume in column II as per the composition of air. Which of the following options are correct for the above table:

Match the lung capacities in Column A with the quantities in Column B.

$\begin{matrix} Column A & Column B i. Dead air space & a. 6000 mL ii. Tidal volume & b. 3500 mL iii. Inspiratory capacity & c. 500 mL iv. Total lung capacity & d. 150 mL \end{matrix}$

Match the reasons given in column 2 to the features of cacti in column 1.

$\begin{matrix} F e a t u r e o f c a c t i & R e a s o n s a . Spiny leaves & (i) Absorbing water from depths of soil b . Thick, round fleshy stems & (i i) Prevent loss of water by transpiration c . Deep roots & (i i i) Store water d . Closed stomata during the day & (i v) Prevent animals from eating the cactus e . Carbon dioxide storage during the night \end{matrix}$

Choose the correct option that matches correctly. There can be multiple matches.

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