The correct options are as follows;
1. D.
Sulfur is an element with atomic number of 16. It is a non metals and thus has the characteristic properties of non metals. It occurs as a solid at room temperature and it has pale yellow colouration. It is brittle in nature, that is, it has tendency to break easily. It is insoluble in water and burns with a blue flame. When heated in air, it oxidizes into sulfur dioxide.
2. D.
The periodic table of element is divided into different blocks, which are assigned different numbers. The P6 block of the periodic table is the block that belong to the noble gases. The noble gases in P6 block are: Helium, neon, argon, krypton, xenon and radon. Noble gases are odorless, colorless and they are capable of conducting electricity. They are the most stable group of elements because they have 8 electrons in their valence shells.
3. A.
The p block refers to the area of the periodic table which is occupied by column 3A to column 8A excluding helium; All the element in the P block are 35 in number and they all have valence electrons in the P orbital. Out of all the options given above, the only element that belongs to the P block is oxygen.
4. B.
Phosphorus has an atomic number of 15 with the electronic configuration of 2,8,5. This configuration implies that phosphorus has five electrons in its outermost shell. Phosphorus exist as a solid at room temperature and it has three different forms, which are white, red and black phosphorus. White phosphorus is very reactive while the other two forms are quite stable.
