GIVE REASONS a. People often encounter problems like nose bleeding when they reach high altitudes. b. Tough to write on a very smooth paper? c. Sodium reacts with cold water, whereas iron does not.
Answers
a) Nosebleeds can be caused by being up in a very high altitude. As you climb higher, the amount of oxygen in the air decreases. This makes the air thinner and dryer, which can in turn cause the inside of your nose to crack and bleed.
b) The main issue with smooth paper is that the paper is also frictionless and even the pen is designed to write smoothly. So, as you know without friction writing is just impossible. If you try to write it will be often slipping down.
c) Iron doesnt react with water but reacts with steam on prolonged exposure. sodium reacts violently with cold water (as well as air) as it is a highly reactive metal whereas iron does not as it is not so reactive. to prevent the reaction of sodium with air and water, it is stored in kerosine.