Molecular Geometry and Polarity of H2S

The video tutorial explores whether H2S is a polar or non-polar molecule. Initially, the Lewis structure suggests symmetry, but the VSEPR theory reveals that lone pair electrons on sulfur push hydrogen atoms downward, creating a polar molecule with distinct positive and negative poles. The video concludes by suggesting a revised Lewis structure to better represent H2S's polarity.

What initial observation is made about the Lewis structure of H2S?

• It has no lone pairs.

• It is a linear molecule.

• It appears symmetrical.

• It appears asymmetrical.

What theory is used to understand the arrangement of electrons in H2S?

• Molecular Orbital Theory

• Valence Bond Theory

• Crystal Field Theory

• Valence Shell Electron Pair Repulsion Theory

In the molecular geometry of H2S, what color represents sulfur?

• Red

• Blue

• Yellow

• White

How do the lone pairs of electrons affect the shape of the H2S molecule?

• They have no effect.

• They make it linear.

• They push the hydrogen atoms upward.

• They push the hydrogen atoms downward.

What indicates that H2S is a polar molecule?

• It has no poles.

• It has two positive poles.

• It has two negative poles.

• It has a positive and a negative pole.

What is the significance of the blue and red colors in the polarity explanation of H2S?

• Both are neutral.

• Blue is negative, red is positive.

• Blue is positive, red is negative.

• Both are positive.

What is suggested as a better way to draw the Lewis structure of H2S?

• As a linear molecule

• With lone pairs at the bottom

• With no lone pairs

• Based on its molecular geometry