Grade 10 science exam review
with correct answers 2025
What is a synthesis reaction?<correct answers>A + B → AB
when two reactants combine to make a larger product
What is a decomposition reaction?<correct answers>AB → A + B
when a large molecule breaks down to form two or more smaller products
Balance this equation: Mg + O₂ →MgO<correct answers>2Mg + O₂ → 2MgO
What are some examples of physical changes?<correct answers>→ changes state
→changes size
→dissolving
On the pH scale, what numbers are acids?<correct answers>0-6
On the pH scale, what numbers are bases<correct answers>8-14
What is considered neutral on the pH scale?<correct answers>7
what are ionic compounds<correct answers>a compound made up of a non metal
and a metal
with correct answers 2025
What is a synthesis reaction?<correct answers>A + B → AB
when two reactants combine to make a larger product
What is a decomposition reaction?<correct answers>AB → A + B
when a large molecule breaks down to form two or more smaller products
Balance this equation: Mg + O₂ →MgO<correct answers>2Mg + O₂ → 2MgO
What are some examples of physical changes?<correct answers>→ changes state
→changes size
→dissolving
On the pH scale, what numbers are acids?<correct answers>0-6
On the pH scale, what numbers are bases<correct answers>8-14
What is considered neutral on the pH scale?<correct answers>7
what are ionic compounds<correct answers>a compound made up of a non metal
and a metal
