Science MCQ Questions with answers

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Here Important Science MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping Share button.

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📊 Science
Q. The richest source of vitamin D is?
  • (A) Cold liver oil
  • (B) Spinach
  • (C) Milk
  • (D) Cheese
💬 Discuss
✅ Correct Answer: (A) Cold liver oil
📊 Science
Q. Two richest known sources of edible protein are?
  • (A) Meat and eggs
  • (B) Milk and vegetables
  • (C) Soybean and groundnuts
  • (D) Some algae and other micro organism
💬 Discuss
✅ Correct Answer: (C) Soybean and groundnuts
📊 Science
Q. What is the good source of vitamin C?
  • (A) Lemon
  • (B) Milk
  • (C) Curd
  • (D) Banana
💬 Discuss
✅ Correct Answer: (A) Lemon
📊 Science
Q. Healing and wounds is hastened by vitamin
  • (A) A
  • (B) C
  • (C) E
  • (D) K
💬 Discuss
✅ Correct Answer: (B) C
📊 Science
Q. Flower colours are due to
  • (A) Chlorophyll
  • (B) Melanin
  • (C) Phytochromes
  • (D) Anthocyanins
💬 Discuss
✅ Correct Answer: (D) Anthocyanins
📊 Science
Q. Desert plants would be characterized by
  • (A) Vivipary
  • (B) Aerenchyma
  • (C) Aerial roots
  • (D) Sunken stomata
💬 Discuss
✅ Correct Answer: (D) Sunken stomata
📊 Science
Q. pH of human blood is between
  • (A) 6.5 - 7
  • (B) 7.5 - 8
  • (C) 8 - 9
  • (D) 4.5 - 5
💬 Discuss
✅ Correct Answer: (B) 7.5 - 8
📊 Science
Q. The short upper part of the human intestine next to the stomach is called
  • (A) Caecum
  • (B) Duodenum
  • (C) Ileum
  • (D) Jejunum
💬 Discuss
✅ Correct Answer: (B) Duodenum
📊 Science
Q. Nuclear Fission is caused by the impact of
  • (A) Proton
  • (B) Electron
  • (C) Neutron
  • (D) None of these
💬 Discuss
✅ Correct Answer: (C) Neutron

Explanation: In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.



Thus, The Nuclear Fission is caused by the impact of Neutrons.

📊 Science
Q. Which of the following is used as a coolant in nuclear reactors?
  • (A) Heavy water
  • (B) Cadmium
  • (C) Liquid sodium
  • (D) Graphite
💬 Discuss
✅ Correct Answer: (C) Liquid sodium

Explanation: A nuclear reactor coolant is a coolant used to remove heat from the nuclear reactor core and transfer it to electrical generators and the environment. Carbon dioxide, Helium and Liquid Sodium can be used as coolant in a nuclear reactor.

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