Choose the most appropriate reagent(s) for the conversion of propyne and 2-methyl-1-tosyloxypropane to 5-methyl-2-hexyne. nanh2, nh3 naoh, h2o koch2ch3, hoch2ch3 h2so4 nh3

NaNH2, NH3

Explanation:

Choose the most appropriate reagent(s) for the conversion of propyne and 2-methyl-1-tosyloxy propane to 5-methyl-2-hexyne. NaNH2, NH3 NaOH, H2O KOCH2CH3, HOCH2CH3 H2SO4 NH3

answer is  NaNH2, NH3

NaNH2, NH3 is strong to to convert propyne into a nucleophilic salt which in turn displaced tosylate in  2-methyl-1-tosyloxy propane to yield  5-methyl-2-hexyne.

Propyne and 5-methyl-2-hexyne. are still of the same homologous series,, so no triple bond is broken during the reaction

The essence of a reagent is to bring the reaction to its end point

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the volume increases