1. Which metal is liquid at room temperature? (Q74) 2. Which vitamin is produced when skin is exposed to sunlight? 3. Which metal is liquid at room temperature? (Q49) 4. What is the SI unit of electric current? 5. What is the SI unit of force? 6. Which metal is liquid at room temperature? (Q44) 7. Which gas do plants absorb in photosynthesis? (Q45) 8. What is the SI unit of electric current? (Q86) 9. Which blood cells carry oxygen? (Q43) 10. Which blood cells carry oxygen? (Q28)