Board Exam 2022 most imp central idea‘ Keeping Quiet’

The most stable measure of central tendency is

According to Central Pollution Central Board particulate size 2.5 mu m or less in diameter are responsible for causing greatest harm to human health.

According to Central Pollution Control Board the permissible ambient noise levels for silent zone during day time is

Bee keeping practice is a good income generating industry. Write the different points to be kept in mind for successful bee keeping. Write the scientific name of the most common Indian species used for the purpose.

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:

The Central Pollution Control Board has recommended zone-wise permissible ambient noise level for residential area during day and night time is