railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Chemistry in Everyday Life
Overuse of chemical fertilisers in agriculture makes the soli acidic and the land infertile. What substance is generally added to the soil to neutralize this effect?
1
NaOH
2
Mg(OH)2
3
Na2CO3
4
CaO