railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Chemistry Chemistry in Everyday Life

An air-pump is kept in an aquarium in order to

1
provide more carbon dioxide to water plants
2
allow more oxygen to dissolve in water
3
enhance the beauty of the aquarium
4
make water cleaner
Share: WhatsApp Telegram X

Sponsored

hivanix.in

Visit

This quiz is brought to you by hivanix.in

🌐 Web App Development

Other Tools: chatwiz.hivanix.in mmspace.hivanix.in unogame.hivanix.in

Quick Navigation

Home

Subjects

Chapters