Q3: Current Affairs MCQ 2017

**Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by:**A) ConductionB) ConvectionC) RadiationD) Reflection Show Answer Correct Answer: C – Radiation

**Which of the following gases is essential for humans?**A) Carbon dioxideB) NitrogenC) OxygenD) None of these Show Answer Correct Answer: C – Oxygen

**Which refrigerant is commonly used in cold storage in our country?**A) EthyleneB) CarbideC) Liquid ammoniaD) Sodium benzoate Show Answer Correct Answer: C – Liquid ammonia

**Which of the following is the correct ordering of the inner planets according to their proximity to the sun?**A) Jupiter, Saturn, Uranus, NeptuneB) Phobos, Deimos, Europa, TitanC) Mercury, Venus, Earth, MarsD) None of these Show Answer Correct Answer: C – Mercury, Venus, Earth, Mars