Which of the following metal will not give H2 gas with NaOH.
- Al
- Zn
- Sn
- Ca
The correct answer will be Ca. Ca does not react with sodium hydroxide to produce hydrogen .
All other 3 will release H2 gas as follows:
2Al(s) + 2NaOH(aq) + 6H2O → 2Na+(aq) + 2[Al(OH)4]- + 3H2(g)
Sn + 2 NaOH + 4 H2O → Na2[Sn(OH)6] + 2 H2
All other 3 will release H2 gas as follows:
2Al(s) + 2NaOH(aq) + 6H2O → 2Na+(aq) + 2[Al(OH)4]- + 3H2(g)
Sn + 2 NaOH + 4 H2O → Na2[Sn(OH)6] + 2 H2