General Science MCQs and Notes

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📊 General Science
Q. The noble gases are a group of chemical elements with very similar properties: under standard conditions, they are all odorless, colorless, monatomic gases, with a very low chemical reactivity. How many Noble gases occur naturally?
  • (A) 5
  • (B) 6
  • (C) 7
  • (D) 8
💬 Discuss
✅ Correct Answer: (B) 6
📊 General Science
Q. Which among the following of a catalyst does not change at the end of a reaction?
  • (A) Quantity
  • (B) Chemical Composition
  • (C) Both Quantity and Chemical com position
  • (D) None of the above
💬 Discuss
✅ Correct Answer: (C) Both Quantity and Chemical com position
📊 General Science
Q. Which among the following provides the centripetal force to an electron circulating around the nucleus?
  • (A) electrostatic forces of repulsion
  • (B) electrostatic force of attraction
  • (C) speed of the electron
  • (D) nuclear charge
💬 Discuss
✅ Correct Answer: (B) electrostatic force of attraction
📊 General Science
Q. Which of the following are found in nucleus of Deuterium
  • (A) 1 proton & 1 neutron
  • (B) 2 protons
  • (C) 1 proton and 1 electron
  • (D) 2 neutrons only
💬 Discuss
✅ Correct Answer: (A) 1 proton & 1 neutron
📊 General Science
Q. Cassiterite is an ore of which of the following ?
  • (A) Iron
  • (B) Zinc
  • (C) Copper
  • (D) Tin
💬 Discuss
✅ Correct Answer: (D) Tin
📊 General Science
Q. Steel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.1% by weight. An increasing amount of Iron will result in which of the following?
  • (A) Increase Hardening
  • (B) Decrease Hardening
  • (C) Increase ductility
  • (D) Increase melting Point
💬 Discuss
✅ Correct Answer: (A) Increase Hardening
📊 General Science
Q. A Cyclotron is ___?
  • (A) A charged particle
  • (B) A particle Accelerator
  • (C) A magnetic particle
  • (D) A radioactive particle
💬 Discuss
✅ Correct Answer: (B) A particle Accelerator
📊 General Science
Q. What is the atomic number of Transuranic elements?
  • (A) Greater than 90
  • (B) Greater than 92
  • (C) Greater than 91
  • (D) Greater than 93
💬 Discuss
✅ Correct Answer: (B) Greater than 92
📊 General Science
Q. Which among the following is the most important characteristic of Noble metals?
  • (A) Luster
  • (B) Non reactive nature
  • (C) Preciousness
  • (D) Rare availability
💬 Discuss
✅ Correct Answer: (B) Non reactive nature
📊 General Science
Q. Which among the following gas is used in Balloons?
  • (A) Hydrogen
  • (B) Helium
  • (C) Nitrogen
  • (D) Oxygen
💬 Discuss
✅ Correct Answer: (B) Helium

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