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: Energy source used by green plants
A) Oxygen
B) Soil
C) Water
D) Sunlight
✅ Correct Answer: D
Explanation: Sunlight is used by plants to perform photosynthesis and produce food.
Q: Organ responsible for oxygen exchange in humans
A) Liver
B) Heart
C) Kidney
D) Lungs
✅ Correct Answer: D
Explanation: Lungs facilitate the exchange of oxygen and carbon dioxide during breathing.
Q: Color resulting from combination of all visible light
A) White
B) Blue
C) Yellow
D) Red
✅ Correct Answer: A
Explanation: White light is formed by the combination of all colors in the visible spectrum.
Q: Phase of matter with highest energy
A) Gas
B) Solid
C) Liquid
D) Plasma
✅ Correct Answer: D
Explanation: Plasma has the highest energy level among all states of matter.
Q: Gland producing insulin in the body
A) Kidney
B) Pancreas
C) Liver
D) Thyroid
✅ Correct Answer: B
Explanation: The pancreas regulates blood sugar by producing insulin.
Q: Organ used to pump blood in the human body
A) Brain
B) Heart
C) Liver
D) Lungs
✅ Correct Answer: B
Explanation: The heart circulates blood throughout the body via arteries and veins.
Q: Metal that reacts quickly with water
A) Sodium
B) Silver
C) Copper
D) Iron
✅ Correct Answer: A
Explanation: Sodium reacts violently with water, producing heat and hydrogen gas.
Q: Primary gas responsible for greenhouse effect
A) Oxygen
B) Carbon dioxide
C) Hydrogen
D) Nitrogen
✅ Correct Answer: B
Explanation: Carbon dioxide traps heat in Earth’s atmosphere, contributing to global warming.
Q: Device converting solar energy into electricity
A) Transformer
B) Solar panel
C) Dynamo
D) Battery
✅ Correct Answer: B
Explanation: Solar panels capture sunlight and convert it into electrical energy.
Q: Strongest naturally occurring material
A) Steel
B) Diamond
C) Quartz
D) Graphite
✅ Correct Answer: B
Explanation: Diamond has the highest hardness on the Mohs scale of mineral hardness.