Safe disposal of mercury is -
Collect carefully and recycle
Controlled combustion
Treatment with chemicals
Deep burial
Ans. is 'a' i.e., Collect carefully and recycle o All mercury and mercury-containing items should be recycled. o It should never be poured down a drain or sewer, flushed down a toilet, or thrown in the thrash. o As long as mercury is recycled, it will stay in the recycling loop, going into new products rather than into the environment.