27) Which is the most powerful oxidizing agent. Iodine fluorine oxygen lithium .

Question

27) Which is the most powerful oxidizing agent.

Iodine

fluorine

oxygen

lithium

.

28) Why do most materials fail?

Theoretical, ultimate stress is reached

Defects

Sin

Boston Tunnel Authority

.

29) Semiconductors are transparent in the following regions:

               a) At wavelengths longer than their bandgap energy, Eg.

               b) At wavelengths shorter than their bandgap energy, Eg.

               c) Only at their bandgap energy, Eg.

               d) They are not transparent at any wavelength

Please answer all of them without guessing!!! Thanks

Explanation / Answer

27) flourine is most powerful oxidising agent

28) theoritical ultimate stress is reached

29) b

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