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Atmosphere

In which laye...

Question

In which layer of the atmosphere the molecules are broken into charged particles called ions?

A

Troposphere

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B

Ionosphere

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C

Ozonosphere

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D

Stratosphere

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Solution

The correct option is B Ionosphere
Ans. (b)

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Q. Choose or find odd word:
Thermosphere, Stratosphere, Exosphere, Ionosphere, Troposphere

Tick the correct answer.

(i) Which of the following gases protects us from harmful sun rays?

(a) Carbon dioxide

(b) Nitrogen

(c) Ozone

(ii) The most important layer of the atmosphere is

(a) Troposphere

(b) Thermosphere

(c) Mesosphere

(iii) Which of the following layers of the atmosphere is free from clouds?

(a) Troposphere

(b) Stratosphere

(c) Mesosphere

(iv) As we go up the layers of the atmosphere, the pressure

(a) Increases

(b) Decreases

(c) Remains the same

(v) When precipitation comes down to the Earth in the liquid form, it is called

(a) Cloud

(b) Rain

(c) Snow

Q. Complete the following passage(s) with an appropriate word/term to be filled in the blank spaces.
Troposphere, Stratosphere, Triatomic, Ozonosphere, Ozone shield, Diatomic, Ozone, Equator, Poles, Reactive.
Ozone is a __(1)__molecule made up of three atoms of oxygen,

O_{3}

. The normal oxygen molecule is __(2)__. Oxygen is essential for all aerobic forms and combustion activities. __(3)__ is a deadly poison. Very little of it is present in the lower part of the atmosphere called __(4)__. A good quantity of ozone is present in the stratum of the atmosphere called __(5)__. It lies above the troposphere and extends between 16-50 km of height above __(6)__ and 8-30 km above __(7)__. Here, it is formed in situ from oxygen by the action of high energy ultraviolet rays. The latter split some oxygen molecules into nascent or atomic oxygen (O). Atomic oxygen is highly __(8)__. It combines with (

O_{2}

) to form ozone. The area of the stratosphere which is rich in ozone is called the ozone layer or ____(9)____. It is also called __(10) __.

Q. Match List I(Layers of Atmosphere) and List II(Characteristics) and select the answer using the code given below:

List I (Layer of Atmosphere)	List II(Characteristics)
(A) Ionosphere	(I) Contains Ozone
(B) Stratosphere	(II) Reflects radio waves
(C) Exosphere	(III) Fall in temperature
(D) Tropsphere	(IV) Extremely low air density

Why ozone layer can only form in stratosphere and not in troposphere

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