NEET 2023

Which amongst the following options is correct graphical representation of Boyle's law?

The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to \(\left(\frac{1}{16}\right)^{\text {th }}\) of its initial value?

Given below are two statements :

Statement I : The forces generated transpiration can lift a xylem-sized column of water over 130 meters height.

Statement II : Transpiration cools leaf surfaces sometimes 10 to 15 degrees evaporative cooling.

In the light of the above statements, choose the most appropriate answer from the options given below :

What fraction of one edge centred octahedral void lies in one unit cell of fcc?

A metal wire has mass \((0.4 \pm 0.002) ~\mathrm{g}\), radius \((0.3 \pm 0.001) ~\mathrm{mm}\) and length \((5 \pm 0.02) ~\mathrm{cm}\). The maximum possible percentage error in the measurement of density will nearly be :

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by