AP Chemistry MCQ Question with Answer

AP Chemistry MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 8
Which element is essential for human bone health?

Calcium

Iron

Sodium

Potassium

Question No : 9
The pH scale measures the acidity or alkalinity of a substance. A pH value of 7 is considered:

Acidic

Alkaline

Neutral

Basic

Question No : 10
Which element is the most abundant in Earth's crust?

Oxygen

Silicon

Carbon

Hydrogen

Question No : 11
Which gas is essential for photosynthesis in plants?

Carbon dioxide

Oxygen

Nitrogen

Methane

Question No : 12
What is the chemical formula for water?

H2O

CO2

CH4

Question No : 13
What is the chemical symbol for potassium?

Question No : 14
What is the chemical formula for hydrogen gas?

CO2