Which of the following is the correct observation of the reaction shown in the above set up? 

 

With the reference to four gases ${\mathrm{CO}}_2, \mathrm{CO}, {\mathrm{Cl}}_2$ and ${\mathrm{O}}_2$, which one of the options in the table is correct?

The formulae of four organic compounds are shown below. Choose the correct option

In the given transverse section of the leaf identify the layer of cells where maximum photosynthesis occurs.

Observe the experimental setup shown below. Name the chemical indicated as ‘X’ that can absorb the gas which is evolved as a byproduct of respiration.

Observe the three figures given below. Which of the following depicts tropic movements appropriately?