What is formed when methanol is oxidized in the presence of $Ag_{2}O$ at an appropriate temperature?

Which of the following is the correct representation of the electron dot structure of nitrogen $(N_2)$?

In the modern industrial method for the production of ethanol, hydration of ethene is carried out in the presence of which substance?

$A$ compound $C$ (molecular formula $C_2H_4O_2$) reacts with $Na$ metal to form a compound $R$ and evolves a gas which burns with a pop sound. Compound $C$ on treatment with an alcohol $A$ in the presence of an acid forms a sweet-smelling compound $S$ (molecular formula $C_3H_6O_2$). On addition of $NaOH$ to $C$,it also gives $R$ and water. $S$ on treatment with $NaOH$ solution gives back $R$ and $A$. Identify $C$,$R$,$A$,$S$ and write down the reactions involved.

Buckminsterfullerene is an allotropic form of

Define the term 'structural isomerism'. Explain why propane cannot exhibit this property. Draw the structures of possible isomers of butane,$C_{4}H_{10}$.