Question

1. Which of the following is a single replacement reaction? CaO + H2O yields Ca(OH)2 Mg + 2HNO3 yields Mg(NO3)2 + H2 NaOH + HCl yields H2O + NaCl CH4 + 2O2 yields CO2 + 2H2O

Answer 1

The single replacement reaction is

Mg + 2 HNO₃ → Mg(NO₃)₂ +H₂

Step-by-step explanation

• Single replacement reaction is type of chemical reaction in which element react with compound and take the place of another element in that compound.

• The reaction above is a single replacement because Mg ( an element) react with HNO₃( a compound) and Mg replaces H from HNO₃ to Mg(NO₃)₂ and H₂