Saturday, February 14, 2009

Questions-Problems - Chemistry - Physics- Mathematics - Feb 15

Chemistry – Chemical equilibrium

The pKa of acetylsaliclic acd (aspirin) is 3.5. the pH of of gastric juice in the human stomach is about 2 to 3 and the pH in the small intestine is about 8. Aspirin will be

a. unionized in the small intestine and in he stomach.
b. completely ionized in the small intestine and in the stomach.
d. ionized in the stomach and unionized in the small intestine.
d. ionized in the small intestine and almost unionized in the stomach

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Physics Newton’s Laws

A body weighs 8 gm when placed in one pan and 18 gm when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, the true weight of the body is

a. 12 gm
b 13 gm
c. 15 gm
d. 15.5

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