Science MCQs
Science MCQs offer a general overview of multiple scientific disciplines such as physics, chemistry, and biology. These questions are ideal for students, job seekers, and competitive exam candidates looking to enhance their scientific knowledge. Whether you're preparing for SSC, HSSC, or general job tests, these MCQs provide a mix of theoretical and practical science questions. This category is particularly useful for testing concepts related to laws of motion, periodic table, cell structure, human anatomy, electricity, and more. The MCQs are curated to support concept building and revision. They also help in developing problem-solving abilities and logical analysis skills, which are crucial in science-based exams.
Q: Organ responsible for pumping blood
A) Liver
B) Lungs
C) Brain
D) Heart
✅ Correct Answer: D
Explanation: Heart continuously pumps blood throughout the body via blood vessels.
Q: Body part mainly responsible for balance
A) Arms
B) Legs
C) Eyes
D) Ears
✅ Correct Answer: D
Explanation: The inner ear contains the vestibular system that maintains body balance.
Q: Process through which plants make food
A) Photosynthesis
B) Germination
C) Respiration
D) Digestion
✅ Correct Answer: A
Explanation: Photosynthesis is the process by which plants synthesize food using sunlight.
Q: First element in the periodic table
A) Oxygen
B) Helium
C) Hydrogen
D) Lithium
✅ Correct Answer: C
Explanation: Hydrogen is the lightest and first element in the periodic table.
Q: Gas used by plants during photosynthesis
A) Nitrogen
B) Carbon dioxide
C) Oxygen
D) Hydrogen
✅ Correct Answer: B
Explanation: Carbon dioxide is absorbed by plants to produce glucose in photosynthesis.
Q: Blood cells responsible for oxygen transport
A) Red cells
B) Platelets
C) White cells
D) Plasma
✅ Correct Answer: A
Explanation: Red blood cells carry oxygen from the lungs to the body tissues.
Q: Standard unit of electric current
A) Watt
B) Ohm
C) Ampere
D) Volt
✅ Correct Answer: C
Explanation: Ampere is the SI unit used to measure electric current.
Q: Energy stored in food is called
A) Mechanical energy
B) Chemical energy
C) Heat energy
D) Electrical energy
✅ Correct Answer: B
Explanation: Chemical energy is stored in food and released during metabolism.
Q: Main source of energy for Earth
A) Coal
B) Moon
C) Wind
D) Sun
✅ Correct Answer: D
Explanation: Sun provides solar energy, the primary source for life and weather systems.
Q: Organ responsible for filtering blood
A) Intestine
B) Kidney
C) Lungs
D) Liver
✅ Correct Answer: B
Explanation: Kidneys remove waste and excess fluids through urine formation.