اسئلة تخص الكيمياء ..

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6. Which of these is the systematic name for the compound represented below?



A. 2-ethylbutane
B. 3-methylpentene
C. 3-methyl-1-pentene
D. 3-methyl-1-hexene
E. 2-methylhexane


9. Acetylene, C2H2, the simplest alkyne, can be prepared from "inorganic" materials. Which of these reactions is used to prepare acetylene in this way?

A. 2C + H2 ---> C2H2
B. C2H4 ---> C2H2 + H2
C. 2CO + 2H2O ---> C2H2 + H2O2
D. CaC2 + 2H2O ---> C2H2 + Ca(OH)2


2. What is the hybridization on the central atom in NO3- ?

A. sp
B. sp2
C. sp3
D. sp3d
E. sp3d2



3. In which one of the following molecules is the central atom sp2 hybridized?

A. SO2
B. N2O
C. BeCl2
D. NF3
E. PF5

66. Which of the following molecules have the same geometries?

A. NH2- and H2O
B. NH2- and BeH2
C. H2O and BeH2
D. NH2-, H2O, and BeH2