πŸ“Š Chemistry
Q. Which of the following elements is a metalloid?
  • (A) Sodium
  • (B) Silicon
  • (C) Sulfur
  • (D) Phosphorus
πŸ’¬ Discuss
βœ… Correct Answer: (B) Silicon

Explanation: Silicon shows properties of both metals and non-metals, making it a metalloid.

πŸ“Š Chemistry
Q. Which of the following is used in photography?
  • (A) Silver bromide
  • (B) Sodium chloride
  • (C) Calcium sulfate
  • (D) Magnesium oxide
πŸ’¬ Discuss
βœ… Correct Answer: (A) Silver bromide

Explanation: Silver bromide is sensitive to light and is used in photographic films.

πŸ“Š Chemistry
Q. Which gas is produced during photosynthesis?
  • (A) Carbon dioxide
  • (B) Nitrogen
  • (C) Oxygen
  • (D) Hydrogen
πŸ’¬ Discuss
βœ… Correct Answer: (C) Oxygen

Explanation: During photosynthesis, plants convert carbon dioxide and water into glucose and release oxygen.

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