Science MCQ GK Questions with Answers for Competitive Exams 2025

Science GK Quizes are one of the important subject in most of the competitive exams. So following are the list of important MCQ GK questions with answers on the topic Science. Check how many questions you guessed right?

Science GK Questions with Answers


Science GK Questions with Answers

[1] Which part of the human brain controls balance and coordination?

(a) Cerebrum
(b) Cerebellum
(c) Medulla
(d) Thalamus
Answer: Cerebellum

[2] What is the powerhouse of the cell?

(a) Mitochondria
(b) Endoplasmic Reticulum
(c) Ribosome
(d) Nucleus
Answer: Mitochondria

[3] What is the study of fungi called?

(a) Botany
(b) Zoology
(c) Mycology
(d) Entomology
Answer: Mycology

[4] What is the chemical symbol for the element Potassium?

(a) P
(b) Pt
(c) Po
(d) K
Answer: K

[5] Which vitamin is produced when the human skin is exposed to sunlight?

(a) Vitamin A
(b) Vitamin B
(c) Vitamin C
(d) Vitamin D
Answer: Vitamin D

[6] Which is the largest planet in our solar system?

(a) Earth
(b) Saturn
(c) Uranus
(d) Jupiter
Answer: Jupiter

[7] What is the smallest unit of life?

(a) Cell
(b) Molecule
(c) Tissue
(d) Atom
Answer: Cell

[8] Which planet is known as the 'Red Planet'?

(a) Mars
(b) Venus
(c) Jupiter
(d) Saturn
Answer: Mars

[9] What is the pH value of pure water?

(a) 6
(b) 5
(c) 7
(d) 8
Answer: 7

[10] Which organ is responsible for pumping blood in the human body?

(a) Lungs
(b) Brain
(c) Kidney
(d) Heart
Answer: Heart

[11] What is the boiling point of water at standard atmospheric pressure?

(a) 110°C
(b) 90°C
(c) 120°C
(d) 100°C
Answer: 100°C

[12] What is the main component of natural gas?

(a) Butane
(b) Methane
(c) Propane
(d) Ethane
Answer: Methane

[13] Which blood group is known as the universal donor?

(a) AB
(b) A
(c) B
(d) O
Answer: O

[14] What is the most abundant element in the universe?

(a) Carbon
(b) Helium
(c) Hydrogen
(d) Oxygen
Answer: Hydrogen

[15] What is the speed of light in vacuum?

(a) 300,000 km/s
(b) 150,000 km/s
(c) 600,000 km/s
(d) 450,000 km/s
Answer: 300,000 km/s

[16] What is the name of the process by which plants make food using sunlight?

(a) Photosynthesis
(b) Digestion
(c) Transpiration
(d) Respiration
Answer: Photosynthesis

[17] What is the unit of measurement for force?

(a) Watt
(b) Joule
(c) Newton
(d) Pascal
Answer: Newton

[18] Which element is commonly used in batteries?

(a) Iron
(b) Lead
(c) Lithium
(d) Mercury
Answer: Lithium

[19] Which gas is most abundant in Earth's atmosphere?

(a) Nitrogen
(b) Carbon Dioxide
(c) Oxygen
(d) Argon
Answer: Nitrogen

[20] Which organ in the human body is primarily responsible for detoxification?

(a) Heart
(b) Lungs
(c) Kidney
(d) Liver
Answer: Liver

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