Which of the following pair of non-metal atoms forms the most polar covalent bond?
a. N and O
b. C and O
c. C and F
d. N and F

Which pair of atoms forms a nonpolar covalent bond?
a. C and O
b. C and S
c. B and O

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

It is a product