Which of the following are not electromagnetic waves?

Viruses are distinct from other living cells because -

Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 \ atm$ pressure in the presence of $BF_3$ forms ethyl propionate?

$A$ galvanometer of resistance $50\,\Omega$ is connected to a battery of $3\,V$ along with a resistance of $2950\,\Omega$ in series. $A$ full-scale deflection of $30$ divisions is obtained in the galvanometer. In order to reduce this deflection to $20$ divisions,the resistance in series should be.......$\Omega$.

In a chloroplast,chlorophyll is found in:

Which of the following concepts best explains why $o-$nitrophenol is more volatile than $p-$nitrophenol?