Molecular Geometry and Valence Electrons

The video tutorial introduces the Doubt and app, which provides instant video solutions for math, physics, chemistry, and biology questions. It explains the concept of expanded octet, where elements have more than eight valence electrons. The tutorial analyzes the presence of expanded octet in SF6, PCl5, and IF7, demonstrating that all these molecules have expanded octets. The video concludes with a promotion of the app, highlighting its utility for students preparing for exams like ITJ and NEET.

What is the main feature of the Doubt and App mentioned in the video?

• Gives live tutoring sessions

• Sells educational merchandise

• Offers free textbooks

• Provides instant video solutions

What is the shape of SF6 as discussed in the video?

• Tetrahedral

• Octahedral

• Trigonal planar

• Linear

How many valence electrons does sulfur have in SF6?

• 8

• 10

• 12

• 14

What is the molecular geometry of PCl5?

• Trigonal bipyramidal

• Octahedral

• Square planar

• Tetrahedral

How many valence electrons does phosphorus have in PCl5?

• 8

• 12

• 10

• 14

What is the number of bonds formed by iodine in IF7?

• 5

• 6

• 7

• 8

How many valence electrons does iodine have in IF7?

• 14

• 10

• 16

• 12

Which of the following elements does not have an expanded octet?

• Carbon in CH4

• Iodine in IF7

• Phosphorus in PCl5

• Sulfur in SF6

What is the common feature of SF6, PCl5, and IF7?

• All are diatomic molecules

• All are ionic compounds

• All have expanded octets

• All are linear molecules

What is the significance of having more than eight valence electrons in an element?

• It loses its chemical reactivity

• It becomes a noble gas

• It indicates an expanded octet

• It forms a linear structure