1sceokarmhoimnaec时rokopoundnoaga A)C1oHis B)C1oH20 C)C1oHi6 D)CnH4 E)CuHis Ans:C 2.Of those indicated,which would be the shortest carbon-carbon bond in a-selinene? A)A B)B C)C D)D E)E Ans:B What would be the ideal value for the indicated bond angle? C)104° D)180°E)109
Page 1 1. What is the molecular formula of limonene, the major volatile compound in orange peel oil? limonene A) C10H18 B) C10H20 C) C10H16 D) C11H14 E) C11H18 Ans: C 2. Of those indicated, which would be the shortest carbon-carbon bond in α-selinene? E D C B A A) A B) B C) C D) D E) E Ans: B 3. What would be the ideal value for the indicated bond angle? C H Br A) 120° B) 90° C) 104° D) 180° E) 109° Ans: E
What would be the"polygon"form of the following condensed structure CHCH2CH(CN)CH=CHz Page2
Page 2 4. What would be the “polygon” form of the following condensed structure? CH3CH2CH(CN)CH=CH2 A) N B) N C) N D) N E) N Ans: A
.Whch of h following structures must nore 0以0 Page
Page 3 5. Which one of the following structures must be incorrect? A) OH B) O C) O D) C C E) Ans: C
not a resonance structure of the others? Page 4
Page 4 6. Which of the following is not a resonance structure of the others? A) OCH3 H H + B) OCH3 H H + C) OCH3 H H + D) OCH3 H H + E) Ans: E
Which one of the resonance structures below would be the most important(ie..most How many atoms in ethene are required by spbonding to lie in the same plane? c=c ethene 0234D)56 Page 5
Page 5 7. Which one of the resonance structures below would be the most important (i.e., most stable)? A) OCH3 H H + B) OCH3 H H + C) OCH3 H H + D) OCH3 H H + E) OCH3 H H + Ans: D 8. How many atoms in ethene are required by sp 2 bonding to lie in the same plane? C C H H H H ethene A) 2 B) 3 C) 4 D) 5 E) 6 Ans: E