MEDIUM
RRB Group D CBT
IMPORTANT
Earn 100

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 vapor in the lower stratosphere.

2. There are no vertical winds in the lower stratosphere.

Which of the statements given above is/are correct?

100% studentsanswered this correctly

Important Questions on Environmental Chemistry

HARD
RRB Group D CBT
IMPORTANT
General Science>Chapter 14 - Environmental Chemistry>Self Check>Q 8

Human activities in the recent past have caused an increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of:
1. its escape into the outer stratosphere.
2. the photosynthesis by phytoplankton in the oceans.
3. the trapping of air in the polar ice caps.

Which of the statements given above is/are correct? Select the correct answer using the codes below.

HARD
RRB Group D CBT
IMPORTANT
General Science>Chapter 14 - Environmental Chemistry>Self Check>Q 9
Recently 'oil zapper' was in the news. What is it?
HARD
RRB Group D CBT
IMPORTANT
General Science>Chapter 14 - Environmental Chemistry>Self Check>Q 10
The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
HARD
RRB Group D CBT
IMPORTANT
General Science>Chapter 14 - Environmental Chemistry>Self Check>Q 11

Consider the following statements

1. Ultraviolet rays coming from Sun causes skin cancer.

2. Carbon monoxide is harmful to human beings as it is with higher affinity for hemoglobin as compared to oxygen.

3. Taj Mahal is threatened by pollution from sulphur dioxide.

4. BOD is Biological Oxygen Demand.

Which of the statements given above is/are correct?