Question

Which of the following equation is balanced?​

• A. $O_2+{\mathrm{NO}}_2+2H_{2}O\to 4{\mathrm{HNO}}_3$
• B. $\mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+H_2$
• C. $O_2+2{\mathrm{SO}}_2+2H_{2}O\to H_2{\mathrm{SO}}_4$
• D. $H_2+{\mathrm{Cl}}_2\to \mathrm{HCl}$

Answer 1

The correct option is B $\mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+H_2$

The equation which is balanced should have an equal number of atoms of all elements on both sides.