A drawing sheet changes when you draw a picture on it. Can you reverse this change?

How many structural isomers can you draw for pentane ?

How many structural isomers can you draw for pentane ?

In a reverse biased diode when the applied voltage changes by 1 V, the current is found to change by 0.5 muA . The reverse bias resistance of the diode is

The change in entropy of an ideal gas during a reversible isothermal expansion is

You accidentally dropped your favourite toy and broke it. This is a change you didi not want. Can this change be reversed?

How many structural isomers can you draw for pentane?