Article Detail Which is the lightest gas ? Answer: Hydrogen Similar Questions : 1. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) 2. What is the name of tallest Animal ? Answer: Giraffe 3. Which is Biggest ocean in the world ? Answer: Pacific ocean 4. Which is the biggest museum in the world ? Answer: British Museum, London 5. Which is Highest Gallantry Award in India ? Answer: Paramveer Chakra 6. Which is biggest planet ? Answer: Jupiter 7. Which is the brightest planet ? Answer: Venus Read more from - Longest and Largest