Hydration of propyne results in the formation of.......

Identify the correct order of acidic strength for the following hydrocarbons:

The number of structural isomers of alkyne possible for the molecular formula $C_6H_{10}$ are

What is the increasing order of acidity for the following substances?
$(1)$ $CH_2=CH_2$
$(2)$ $CH_3-CH_3$
$(3)$ $HC \equiv CH$
$(4)$ $NH_3$

$KMnO_4$ will oxidise acetylene to

Write structures of different isomers corresponding to the $5^{th}$ member of alkyne series. Also write $IUPAC$ names of all the isomers. What type of isomerism is exhibited by different pairs of isomers?