Question 1:

Which group of elements in the periodic table are also known as the representative elements?

Explanation: The correct answer is A) Alkali metals. The alkali metals, located in Group 1 of the periodic table, are often referred to as the representative elements.

Question 2:

Which of the following groups of elements are typically less reactive compared to the alkali metals?

Explanation: The correct answer is A) Alkaline earth metals. The alkaline earth metals, located in Group 2 of the periodic table, are generally less reactive compared to the highly reactive alkali metals.

Question 3:

Which group of elements in the periodic table are known for their variable oxidation states?

Explanation: The correct answer is A) Transition metals. Transition metals are known for their ability to exhibit variable oxidation states due to the presence of partially filled d orbitals.

Question 4:

Which group of elements in the periodic table are often used as catalysts in chemical reactions?

Explanation: The correct answer is A) Transition metals. Transition metals often serve as catalysts in various chemical reactions due to their ability to undergo redox reactions and provide a surface for reaction processes.

Question 5:

Which group of elements in the periodic table are generally harder, denser, and have higher melting points compared to the representative elements?

Explanation: The correct answer is A) Transition metals. Transition metals generally possess higher hardness, density, and melting points compared to the representative elements.