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: Animal known for echolocation
A) Tiger
B) Dolphin
C) Zebra
D) Elephant
✅ Correct Answer: B
Explanation: Dolphins use echolocation to navigate and find prey underwater.
Q: Unit used to measure electricity consumption
A) Watt
B) Joule
C) Ampere
D) Kilowatt-hour
✅ Correct Answer: D
Explanation: Kilowatt-hour is the standard unit for measuring electric energy usage.
Q: Cell structure responsible for energy production
A) Nucleus
B) Golgi body
C) Mitochondrion
D) Ribosome
✅ Correct Answer: C
Explanation: Mitochondria are known as the powerhouses of the cell.
Q: Element most abundant in the human body
A) Oxygen
B) Calcium
C) Iron
D) Carbon
✅ Correct Answer: A
Explanation: Oxygen is the most abundant element by mass in the human body.
Q: State of matter in stars
A) Solid
B) Plasma
C) Liquid
D) Gas
✅ Correct Answer: B
Explanation: Stars are composed mostly of plasma, an ionized state of matter.
Q: Primary cause of tides on Earth
A) Sun
B) Rain
C) Moon
D) Wind
✅ Correct Answer: C
Explanation: Gravitational pull of the moon is the main cause of ocean tides.
Q: Unit of sound intensity
A) Decibel
B) Watt
C) Volt
D) Hertz
✅ Correct Answer: A
Explanation: Decibel (dB) is the unit used to measure the intensity of sound.
Q: Basic unit of life
A) DNA
B) Organelle
C) Atom
D) Cell
✅ Correct Answer: D
Explanation: Cell is the smallest structural and functional unit of living organisms.
Q: Gas used for inflating balloons
A) Helium
B) Oxygen
C) Hydrogen
D) Nitrogen
✅ Correct Answer: A
Explanation: Helium is non-flammable and lighter than air, making it ideal for balloons.
Q: Organ responsible for blood filtration
A) Kidney
B) Heart
C) Lungs
D) Liver
✅ Correct Answer: A
Explanation: Kidneys filter waste from blood and maintain fluid balance.