IIT/JEE Chemistry Practice #15: Electronegativity/Ionic Radii

The video tutorial covers questions on electronegativity and ionic radii, focusing on determining the order of electronegativity for elements, identifying the smallest ion among isoelectronic species, and establishing the correct order of atomic and ionic radii. The tutorial emphasizes the use of the periodic table and the concept of isoelectronic species to solve these questions.

Which of the following elements is the least electronegative?

• Carbon

• Phosphorus

• Silicon

• Nitrogen

What is the most electronegative element among the following?

• Phosphorus

• Silicon

• Nitrogen

• Carbon

Which ion is the smallest among the following?

• N 3-

• O 2-

• Na+

• F-

Which of these ions has the largest atomic number?

• N 3-

• Na+

• O 2-

• F-

Which of the following orders for atomic radii is correct?

• Nitrogen, Beryllium, Boron

• Boron, Beryllium, Nitrogen

• Nitrogen, Boron, Beryllium

• Beryllium, Boron, Nitrogen

Which of these ions is expected to be the smallest?

• F-

• N 3-

• O 2-

• Na+

What is the correct order for the radii of Fe ions?

• Fe 3+, Fe 2+, Fe 4+

• Fe 4+, Fe 3+, Fe 2+

• Fe 2+, Fe 3+, Fe 4+

• Fe 3+, Fe 4+, Fe 2+