Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion?
1). 24
2). 26
3). 28
4). 13
1. Which is known as carbolic acid?
2. In upper layer of atmosphere ozone is formed
3. Glycol is added to aviation gasoline because it
4. Phosphorus is kept in water because
6. All of the following are excretory (waste) products of animals, except
8. Question 13.11:What are the necessary conditions for any system to be aromatic?
9. German silver an alloy does not contain the metal
10. The gas that causes suffocation and death when coal or coke is burnt in a closed room is