Question

Which of the following is a displacement reaction?

विकल्प

• \[\ce{MgCO3 -> MgO + CO2}\]

• \[\ce{2Na + 2H2O -> 2NaOH + H2}\]

• \[\ce{2H2 + O2 -> 2H2O}\]

• \[\ce{2Pb (NO3)2 ->[Heat] 2PbO + 4NO2 + O2}\]

Answer 1

\[\ce{2Na + 2H2O -> 2NaOH + H2}\]

Explanation:

Here sodium (Na) displaces to form sodium hydroxide.