2025 First term mid-term test on Chemistry for SSS 2

1. The property of elements which increases down a group of the periodic table is

2. An element Q forms a compound QCl5. In which group of the periodic table is 'Q'?

3. Which of the following statements about the behavior of the atom is correct?

4. The energy which accompanies the addition of an electron to an isolated gases atom is

5. Which of the following halogens is solid at room temperature?

6. Which of the following elements is a d-block element?

7. Which of the following gases is mono atomic?

8. Rare gases are stable because they

9. When sodium atom forms the ion Na+

10. Group 0 or 18 elements are unreactive because

Subjectives

1. .......and 2. ........are features of the periodic table.

3. .........is the spdf of Vanadium {atomic number=25}

4. .......and 5........are the two categories of families in the periodic table.

Essay. Answer Only 2 Questions

1a. State Modern Periodic Law 1b. Place the following elements in their respective groups and periods using smaller sense of periodic table; i. Na ii. S iii. Li iv. Ar v. He vi. N

2a. State Aufbau Principle 2b. Explain the following as in across the period and down the group: a. Atomic radius b. Ionization energy c. Electron affinity

3a. What is Redox reaction? 3b. Using a chemical equation: show an oxidation reaction.