Everyday Science

Everyday Science MCQs on physics, chemistry, biology, and general scientific literacy commonly asked in Pakistani competitive exams.

• Which is the hardest natural substance on Earth?
• Which part of the human eye controls the amount of light entering it?
• What is the pH value of pure water at 25°C?
• The process by which a solid changes directly into a gas without becoming liquid is called:
• Sound cannot travel through:
• What is the approximate speed of light in vacuum?
• What is the SI unit of electric current?
• Which planet is known as the Red Planet?
• Which scientist proposed the theory of relativity?
• Which gas do plants absorb from the atmosphere during photosynthesis?
• Which vitamin is produced in human skin when exposed to sunlight?
• What is the chemical symbol for water?
• Which blood group is known as the universal donor?
• Which organ in the human body produces insulin?
• Which gas is most abundant in Earth's atmosphere?
• Newton's third law of motion states that: