Question

Which of the following equations shows a chemical change?

A) 2H₂+O₂→2H₂O
B) NaCl+H₂O→NaOH+HCl
C) 3CO₂+4H₂O→C₃H₆O₃+3O₂
D) 2Mg+Cl₂→ 2MgCl₂

Answer 1

The equation that shows a chemical change is 2Mg+Cl₂→ 2MgCl₂.

Step-by-step explanation:

The equation that shows a chemical change is option D) 2Mg+Cl₂→ 2MgCl₂.

In this equation, magnesium (Mg) reacts with chlorine (Cl₂) to form magnesium chloride (MgCl₂). This is a chemical change because new substances are formed with different chemical properties.