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Which one among the following is responsible for formation of "OzoneHoles'in the stratosphere?

Which one among the following is responsible for formation of "OzoneHoles'in the stratosphere? Correct Answer Chloro Fluoro Carbons

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Which among the following option with regard to atmospheric layer of “stratosphere” is NOT correct? 1. The height of the bottom of the stratosphere varies with latitude and with the seasons 2. The lower boundary of the stratosphere is low near the equator as compared to the poles in winter.
The jet aircraft fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in the lower stratosphere 2. There are no vertical winds in the lower stratosphere. Which of the statements given above is/are correct in this context? 
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
1. There are no clouds or water vapour in the lower stratosphere.
2. There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context?
Jet aircraft fly very easily and smoothly in the lower stratosphere. What could be the correct explanation for this? 1. There are no clouds or water vapour in the lower stratosphere. 2. There is no vertical wind in the lower stratosphere.
which one among the following is responsible for formation of 'Ozone Holes' in the stratosphere?
which one among the following is responsible for formation of 'Ozone Holes 'in the stratosphere?
Consider the following statements relating zones of atmosphere to altitude: 1. Temperature decreases with altitude in troposphere. 2. Speed of sound decreases with altitude in troposphere. 3. Temperature increases with altitude in stratosphere. 4. Ozone is present in stratosphere which protects people from harmful effects of solar radiation. Which of the above statements are correct?
The figure of a solid marked 'X' is given below followed by four alternatives 1, 2, 3 and 4. If the solid is viewed in the direction of the arrow, which one of the four alternatives will represent the true view?
Figure Formation and Analysis mcq question image
Which of the following figures shown below, when folded along the dotted lines, will form a pyramid shaped box with a rectangular base?
Figure Formation and Analysis mcq question image
Different designs can be made by placing a maximum of nine matchstics. Which of the following designs cannot be made at all?
Figure Formation and Analysis mcq question image