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Byju's Answer

Standard XII

Chemistry

Ideal Gas Equation

The given dia...

Question

The given diagram shows percentage composition of gases $P, Q, R$ and other gases present in air.
Which of the following statements is/ are correct regarding gases $P, Q$ and $R$ ?
(i) $P$ can be fixed in soil by certain bacteria present in roots of leguminous plants.
(ii) $P$ supports combustion whereas $Q$ and $R$ help in extinguishing fire.
(iii) Plants and animals release $R$ in respiration whereas plants use $Q$ in photosynthesis.
(iv) $R$ entraps sun's heat and makes earth warm and hospitable.

(i) and (iv) only

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(ii) and (iii) only

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(i), (ii) and (iv) only

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(iii) only

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Solution

The correct option is A (i) and (iv) only
According to figure P is nitrogen and nitrogen can be fixed in soil by certain bacteria present in roots of leguminous plants, and Q is oxygen and R is carbon-dioxide which entraps sun's heat and makes earth warm and hospitable.

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Similar questions

The parts P and Q is present only in plant cells, they are not present in animal cells. The part P contains a green pigment called R whereas part Q is made up of tough material S.

Identify P, Q, R and S.

Q. The parts P and Q are present only in plant cells and not in animal cells.
P takes part in the food making process of plant whereas Q gives shape and support to the cells.
What are P and Q?

Q. Trajectories are shown in figure for three footballs. Initially vertical and horizontal velocity components are

u_{y}

and

u_{x}

respectively. Ignoring air resistance, choose the correct statements from List-II for the value of variable in List-I

\begin{matrix} List-I & List-II (I) & Time of flight & (P) & greater for A only (II) & \frac{u_{y}}{u_{x}} & (Q) & greater for C only (III) & u_{x} & (R) & Equal for A and B (IV) & u_{x} u_{y} & (S) & Equal for B and C \end{matrix}

Q. Directions: In the following questions, the symbols @

$ *

and #

δ

are used with the following meaning as illustrated below.

^{'} P $ Q^{'}

means 'P is not smaller than Q'.
'P @ Q' means 'P is neither smaller than nor equal to Q'.
'P # Q' means 'P is neither greater than nor equal to Q'.

^{'} P δ Q^{'}

means 'P is neither greater than nor smaller than Q'.

^{'} P * Q^{'}

means 'P is not greater than Q'.
Now in each of the following questions assuming the given statements to be true, find which of the four conclusions I, II III and IV given below them is/are definitely true and give your answer accordingly
Statements:

D # R, R * K

, K @ F,

F $ J

Conclusions:
I.

J # R

II.

J # K

III.

R # R

IV. K @ D

Q. Three substances P, Q and R are burnt. P burns quickly producing heat and light. Q burns at room temperature on its own. R burns and liberates alot of gases. What type of combustion does P, Q and R undergo?

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The correct option is A (i) and (iv) onlyAccording to figure P is nitrogen and nitrogen can be fixed in soil by certain bacteria present in roots of leguminous plants, and Q is oxygen and R is carbon-dioxide which entraps sun's heat and makes earth warm and hospitable.

The correct option is A (i) and (iv) only
According to figure P is nitrogen and nitrogen can be fixed in soil by certain bacteria present in roots of leguminous plants, and Q is oxygen and R is carbon-dioxide which entraps sun's heat and makes earth warm and hospitable.