General Science Quiz

Which gas is produced when metals react with acids?

• Hydrogen

• Oxygen

• Carbon dioxide

Which organelle is called the "powerhouse of the cell"?

• Nucleus

• Ribosome

• Mitochondria

What is the largest gland in the human body?

• Pancreas

• Liver

• Thyroid

Which blood group is the universal donor?

• A

• B

• O-

Which layer of the Earth's atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

Which gas is primarily responsible for global warming?

• Carbon dioxide

• Oxygen

• Nitrogen

What is the pH value of pure water?

• 5

• 7

• 10

Which class of lever is this?

• Class 1

• Class 2

• Class 3

What is the hardest natural substance on Earth?

• Gold

• Diamond

• Silver

The phenomenon where light bends around obstacles is called?

• Rays

• Refraction

• Diffraction