railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Chemical Reaction
Which of the following is a balanced equation?
1
SiO2 + Mg → Si + MgO
2
SiO2 + 2Mg → Si + 2MgO
3
SiO + Mg → Si + MgO2
4
SiO2 + Mg → SiO + 2MgO