Advertisements
Advertisements
Question
The loudness of a sound that a person can withstand without discomfort is about ______.
Options
150 dB
215 dB
30 dB
80 dB
Solution
The loudness of a sound that a person can withstand without discomfort is about 80 dB.
APPEARS IN
RELATED QUESTIONS
Explain how does the algal bloom eventually choke the water body in an industrial area?
List the events that lead to biogas production from waste water whose BOD has been reduced significantly.
Two types of aquatic organisms in a lake show specific growth patterns as shown below, in a brief period of time. The lake is adjacent to an agricultural land extensively supplied with fertilisers.
Answer the questions based on the facts given above:
(i) Name the organisms depicting the patterns A and B.
(ii) State the reason for the growth pattern seen in A.
(iii) Write the effects of the growth patterns seen above.
What is Biochemical Oxygen Demand significance in an aquatic ecosystem?
Biomagnification is caused mainly by ______.
The expanded form of DDT is ______.
Match the following and choose the correct option:
Column I | Column II |
A. Environment Protection Act | i. 1974 |
B. Air Prevention & Control of Pollution Act | ii. 1987 |
C. Water Act | iii. 1986 |
D. Amendment of Air Act to include noise as an air pollutant | iv. 1981 |
The correct matches are:
Match the following and choose the correct option
Column I | Column II | ||
A. | Environment Protection Act | i. | 1974 |
B. | Air Prevention & Control of Pollution Act | ii. | 1987 |
C. | Water Act | iii. | 1986 |
D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
Match the following and choose the correct option.
Column I | Column II | |
A. | Environment Protection Act | i. 1974 |
B. | Air Prevention & Control of Pollution Act | ii. 1987 |
C. | Water Act | iii. 1986 |
D. | Amendment of Air Act to include noise as an air pollutant | iv. 1981 |
The correct matches is;
Match the following and choose the correct option.
Column I | Column II | ||
A. | Environment Protection Act | i. | 1974 |
B. | Air Prevention & Control of Pollution Act | ii. | 1987 |
C. | Water Act | iii. | 1986 |
D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |