hour_test1 - Student Name _ Weed Science, PLS 4601c Section...

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Student Name _____________________________________________ Weed Science, PLS 4601c Section 7644 and Grad. – Prin. Of Weed Science AGR 6932 Section 9212 University of Florida - Davie http://grove.ufl.edu/~turf/weedscience/ Philip Busey, turf@ufl.edu 954-579-3932 (cell) June 18, 2009 Hour Test 1 (circle the right answers) Chemistry 1. Using the table of periodic elements below, what is the molecular weight of phenol, C 6 H 5 OH ? a) 48 b) 50 c) 78 d) 94 e) None of the above
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Weed Science – Hour Test 1 - Univ. Florida - Davie Page 2 2. How many units of molecular weight of the herbicide MSMA (monosodium methanearsenate) come from the arsenic? It has the molecular formula CH 4 AsNaO 3 a) 1 b) 25 c) 75 d) 100 e) None of the above 3. Methyl isocyanate, a highly toxic organic compound used in the manufacture of some pesticides, caused the Bhopal disaster in 1984. It has the molecular formula C 2 H 3 NO. The methyl group is the: a) C 2 b) N=C c) H 3 d) CH 3 e) None of the above 4. Aromatic hydrocarbons are derived from a 6-carbon molecule which has a strong ring: a) anthracene b) benzene c) glucose d) hexane e) napthalene 5. The molecular weight is about 162 for the herbicide MSMA (monosodium methanearsenate) which has the molecular formula CH 4 AsNaO 3 . What percent arsenic (As) is MSMA? a) 100% b) about 46% c) about 75% d) about 162% e) None of the above
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Weed Science – Hour Test 1 - Univ. Florida - Davie Page 3 6. Which are noble elements? a) H – Li – Na - K b) Be – Mg – Ca - Sr c) F – Cl – Br - I d) He – Ne – Ar - Kr e) None of the above Plant Anatomy and Physiology 7. An organelle that does translation of messenger RNA to polypeptide (precursor to protein): a) logarithm b) mitochondrion c) nucleus d) ribosome e) None of the above 8. What organelle is involved with respiration in plants? a)
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hour_test1 - Student Name _ Weed Science, PLS 4601c Section...

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