A Metal Having a Work Function of 2

question 30

Multiple Choice

A metal having a work function of 2.5 eV is illuminated with white light that has a continuous wavelength band from 400 nm to 700 nm. For which one of the following ranges of the wavelength band in this white light are photoelectrons NOT produced? (h = 6.626 × 10^-34 J ∙ s, c = 3.00 × 10⁸ m/s, 1 eV = 1.60 × 10^-19 J)

• A) 500 nm to 700 nm
• B) 400 nm to 560 nm
• C) 500 nm to 560 nm
• D) 400 nm to 500 nm
• E) 560 nm to 700 nm

Distinguish between different polymerization techniques and predict the conditions under which a given monomer will polymerize.

Describe the stereochemistry of polymers and understand the significance of tacticity.

Explain why certain polymers cannot be formed directly from their corresponding monomers.

Understand the role of initiators in polymerization reactions.

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