What causes acid rain?

Sulfur and nitrogen oxides from pollution

Acids and Bases Quiz – How Much Do You Really Know?

This acids and bases quiz covers the pH scale, common acids like vinegar and lemon juice, bases like baking soda and soap, neutralization, litmus and red cabbage indicators and stomach acid. Ten questions test how much you really know about acids and bases.

Start Acids and Bases Quiz

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

Question 1 / 10 Time: 150s

Scale
What is the pH of pure water at 25 °C?
Acid
A pH below 7 means a solution is what?
Base
Which household substance is a base?
Lemon
Which acid gives lemons their sour taste?
Vinegar
Which acid is found in vinegar?
Stomach
Which acid helps digest food in your stomach?
Neutralization
What do an acid and a base make when they neutralize?
Litmus
What color does blue litmus paper turn in acid?
Scale
Each step on the pH scale represents what change in acidity?
Rain
What causes acid rain?

Explanations: answer key for all 10 questions

Q1: What is the pH of pure water at 25 °C?
Answer: 7
A pH of 7 is neutral.
Q2: A pH below 7 means a solution is what?
Answer: Acidic
Lower numbers are more acidic.
Q3: Which household substance is a base?
Answer: Baking soda
Bases have a pH above 7.
Q4: Which acid gives lemons their sour taste?
Answer: Citric acid
Citrus fruits are rich in it.
Q5: Which acid is found in vinegar?
Answer: Acetic acid
Vinegar is usually about 5% acetic acid.
Q6: Which acid helps digest food in your stomach?
Answer: Hydrochloric acid
Stomach pH can be around 1.5 to 3.5.
Q7: What do an acid and a base make when they neutralize?
Answer: Salt and water
Antacids neutralize excess stomach acid.
Q8: What color does blue litmus paper turn in acid?
Answer: Red
Red litmus turns blue in bases.
Q9: Each step on the pH scale represents what change in acidity?
Answer: Tenfold
pH 3 is ten times more acidic than pH 4.
Q10: What causes acid rain?
Answer: Sulfur and nitrogen oxides from pollution
It harms forests, lakes and buildings.

Acids And Bases Quiz – Sour and Slippery

Acids and bases are two important families of chemicals. Acids taste sour and release hydrogen ions in water, while bases taste bitter, feel slippery and can neutralize acids. Many are found in kitchens, bathrooms and our own bodies.

The pH scale, introduced by Danish chemist Søren Sørensen in 1909, measures acidity from 0 to 14. Seven is neutral, below seven is acidic and above seven is basic. Each step is ten times stronger or weaker than the next.

Acids and bases matter in daily life and nature. Stomach acid digests food, baking soda helps cakes rise, soaps clean grease and farmers test soil pH for crops. Acid rain and ocean acidification show how pollution can shift pH in the environment.

What This Quiz Teaches

This quiz is for students learning about acids and bases.

What the pH scale is
Which foods are acidic
Which household products are bases
What neutralization makes
What causes acid rain

Did You Know?

Red cabbage juice changes color with pH.
Bee stings are acidic; wasp stings are often said to be basic.
Ocean pH has dropped since 1800.
Soap is made by reacting fats with a base.
Hydrangeas change color with soil pH.