_____ is one of the principal gases contributing to the greenhouse effect. A: Formaldehyde B: Methane C: Benzene D: Nitrogen

For which of the following molecules would you expect the infrared active fundamentals to be Raman inactive and vice versa? ( ) A: NO2 B: fluorobenzene C: benzene D: fluoroethene

What kind of poison is the<br/>specific manifestation of the poison when Hernz body appears in the<br/>blood? () A: benzene B: lead C: aniline D: hydrogen cyanide

Risk<br/>factors that predispose to leukemia include all EXCEPT (<br/>) A: Myelodysplastic syndrome B: Infectious mononucleosis C: Down syndrome D: Ionizing radiation E: Benzene

More than three fifths of the country's rivers and lakes are tainted with chemicals, industrial waste or toxic spills like the recent Songhua River benzene slick, which contaminated the water supply in the city of Harbin for days. A: pollute B: paint C: tarnish D: color

Nefazodone is prone to be oxidized and metabolized to produce toxic metabolites. Which of the following strategies are used by scientists to optimize its structure and reduce liver toxicity A: F atom closes metabolic sites B: Benzene ring replaced with pyrimidine ring C: Increase metabolic site steric hindrance D: Introduce metabolizing sites to change metabolic pathways