The $Dharoi$ dam is built on which river?

From the list given below, pick the item that is not a natural resource.

What can a bottle purchased for pickles be used for?

It is important to make small check dams across the flooded gullies because they
$(i)$ hold water for irrigation
$(ii)$ hold water and prevent soil erosion
$(iii)$ recharge groundwater
$(iv)$ hold water permanently

The $pH$ range most conducive for the life of freshwater plants and animals is:

List two items which can easily be recycled, but we generally throw them in the dustbins.