What does a catalyst do?

Speeds up a reaction without being used up

What do catalytic converters in cars do?

Turn harmful gases into less harmful ones

Chemical Reactions Trivia Quiz – Names, Facts and Surprises

This chemical reactions trivia quiz covers signs of reactions, combustion, rusting, neutralization, catalysts, exothermic and endothermic reactions and balancing equations. Ten questions bring names, facts and surprises from the chemistry that changes one substance into another.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Signs
Which is a sign that a chemical reaction has happened?
Burning
What does combustion need?
Rust
Rust forms when iron reacts with what?
Heat out
What is a reaction that releases heat called?
Heat in
What is a reaction that absorbs heat called?
Catalyst
What does a catalyst do?
Law
Who showed that mass is conserved in chemical reactions?
Volcano
What gas fizzes out when baking soda reacts with vinegar?
Cars
What do catalytic converters in cars do?
Photosynthesis
Which reaction turns carbon dioxide and water into sugar using sunlight?

Explanations: answer key for all 10 questions

Q1: Which is a sign that a chemical reaction has happened?
Answer: A gas or color change
Melting and boiling are physical changes.
Q2: What does combustion need?
Answer: Fuel, oxygen and heat
This is known as the fire triangle.
Q3: Rust forms when iron reacts with what?
Answer: Oxygen and water
Rust is hydrated iron oxide.
Q4: What is a reaction that releases heat called?
Answer: Exothermic
Burning wood is exothermic.
Q5: What is a reaction that absorbs heat called?
Answer: Endothermic
Instant cold packs use endothermic reactions.
Q6: What does a catalyst do?
Answer: Speeds up a reaction without being used up
Enzymes are biological catalysts.
Q7: Who showed that mass is conserved in chemical reactions?
Answer: Antoine Lavoisier
Atoms rearrange but are not lost.
Q8: What gas fizzes out when baking soda reacts with vinegar?
Answer: Carbon dioxide
It is a classic school experiment.
Q9: What do catalytic converters in cars do?
Answer: Turn harmful gases into less harmful ones
They use platinum and palladium.
Q10: Which reaction turns carbon dioxide and water into sugar using sunlight?
Answer: Photosynthesis
It releases oxygen as a by-product.

Chemical Reactions Trivia Quiz – Changing One Substance Into Another

A chemical reaction rearranges atoms to form new substances. Signs include color changes, gas bubbles, light, heat or a new solid forming. Unlike physical changes such as melting, chemical changes produce materials with new properties.

Reactions happen everywhere. Burning fuels, rusting iron, cooking food, digesting meals and photosynthesis are all chemical reactions. Some release energy, called exothermic reactions, while others absorb it, called endothermic reactions.

Chemists control reactions using temperature, concentration and catalysts. Antoine Lavoisier showed that mass is conserved, so equations must balance. Understanding reactions helps make medicines, fertilizers, plastics and cleaner engines.

What This Quiz Teaches

This quiz is for students learning about chemical reactions.

How to spot a reaction
What combustion needs
How rust forms
What exothermic and endothermic mean
What catalysts do

Did You Know?

Fireworks get colors from metal salts.
Bread rises from yeast making carbon dioxide.
Glow sticks use chemiluminescence.
The Haber process makes ammonia.
Browning of apples is oxidation.