Which of the following processes does not use a catalyst?

Which of the following compounds is soluble in benzene but almost insoluble in water?

Which of the following was isolated and identified by Skoog and Miller?

The middle lamella is primarily composed of:

For the reaction $SnO_{2(s)} + 2H_{2(g)} \rightleftharpoons 2H_2O_{(g)} + Sn_{(l)}$,calculate $K_p$ at $900 \, K$,where the equilibrium steam-hydrogen mixture was $45 \% \, H_2$ by volume.

Which one of the following is a secondary alcohol?