📊 Physics
Q. The function of ball bearings in a wheel is:
  • (A) to increase friction
  • (B) just for convenience
  • (C) to convert static friction into kinetic friction
  • (D) to convert kinetic friction into rolling friction
💬 Discuss
✅ Correct Answer: (D) to convert kinetic friction into rolling friction
📊 Science
Q. Which of the following one of the following is a greenhouse gas
  • (A) Sulphur dioxide
  • (B) Helium
  • (C) Carbon dioxide
  • (D) Nitrogen
💬 Discuss
✅ Correct Answer: (C) Carbon dioxide
📊 Science
Q. Which of the following of these travels in glass with min. velocity
  • (A) green light
  • (B) violet light
  • (C) red light
  • (D) yellow light
💬 Discuss
✅ Correct Answer: (B) violet light
📊 Science
Q. Zinc sulphide is commonly used as
  • (A) fungicide
  • (B) rodenticide
  • (C) herbicide
  • (D) deodorant
💬 Discuss
✅ Correct Answer: (B) rodenticide
📊 Science
Q. Which among the given does not belong to the halogen family?
  • (A) Chlorine
  • (B) Bromine
  • (C) Morphine
  • (D) Fluorine
💬 Discuss
✅ Correct Answer: (C) Morphine
📊 Physics
Q. A cyclist moves due east at 8 km/h for half an hour and then turns exactly southwards for another half an hour at 6 km/h. The average velocity of the cyclist for the period is
  • (A) 5 km/h
  • (B) 7 km/h
  • (C) 10 km/h
  • (D) 15 km/h
💬 Discuss
✅ Correct Answer: (A) 5 km/h
📊 Science
Q. Which among the given is responsible for the extra strength of pyrex glass
  • (A) Potassium Carbonate
  • (B) Lead Oxide
  • (C) Ferric Oxide
  • (D) Borax
💬 Discuss
✅ Correct Answer: (D) Borax
📊 Chemistry
Q. If there is one million Mg2+ ions in MgCl2, how many chloride ions are there
  • (A) Ten million
  • (B) One million
  • (C) Half a million
  • (D) Two million
💬 Discuss
✅ Correct Answer: (D) Two million
📊 Science
Q. Ice is packed in saw dust as
  • (A) saw dust does not stick to the ice.
  • (B) saw dust will not get melted easily.
  • (C) saw dust is a good conductor of heat.
  • (D) saw dust is poor conductor of heat.
💬 Discuss
✅ Correct Answer: (D) saw dust is poor conductor of heat.
📊 Chemistry
Q. Stalactites & Stalagmites form due to the precipitation of:
  • (A) CaCO3
  • (B) MgCO3
  • (C) MgCl2
  • (D) CaCl2
💬 Discuss
✅ Correct Answer: (A) CaCO3

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