Draw the structure of following compound :

Hex-3-en-1-oic acid

Give the structural formula of $2-$Methylpropan$-2-$ol.

Newman projections $\mathrm{P},\mathrm{Q},\mathrm{R}$ and $\mathrm{S}$ are shown below:

  Which one of the following options represent identical molecules?

How many pi bonds and sigma bonds are present in following molecule?

Which of the following structures contain $sp$-hybridised carbon atom(s)?

I. $\mathrm{HC}\equiv \mathrm{CH}$

II. ${\mathrm{H}}_2\mathrm{C}=\mathrm{C}={\mathrm{CH}}_2$

III. 

IV.