5-8 please. Which of the following statements is true about propyne, H-C C-CH3?

Question

5-8 please.

Which of the following statements is true about propyne, H-C C-CH3? a. It contains a total of three sigma bonds. b. It contains a total of three pi bonds. c. The H-C C bond angle is about 109.5 degree. d. The C C-C bond angle is 180 degree. e. All carbon-carbon bonds are of equal length. Which of the following is the structure for 2-hexyne? a. I b. II c. Ill d. IV Rank the following carbanions in order of Increasing base strength. a. I III > II > IV d. Ill > IV > II > V > I e. IV > II > I > III > V Which of the circled hydrogen atoms is the most acidic? ?. l b. II c. Ill d. IV e. V Sodium amide (NaNH_2, sodamide) reacts with terminal alkynes in the role of the __. a. Bronsted acid b. Bronsted base c. reducing agent d. catalyst e. electrophile The major result of treating 1-butyne with 6M aqueous NaOH would be: a. the production of the sodium alkynide. b. the production of an alkene. c. the production of an alkane. d. the production of an enol. e. nothing, as the alkyne would not react to an appreciable extent. Of the species listed below, select those less basic than acetylide. a. BuLi b. NaNH_2 c. NaOCH_3 d. both A and C e. both B and C

Explanation / Answer

1) d. These are in planar mode.

2) c these have only six carbon athor have more than six carbon.

3) a

4) e

5) e

6) b

7) a

8) c

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