Sherbet sweets contain a mixture of dry citric acid and sodium hydrogen carbonate. When you eat it, you feel cool sensation. Which of the following reaction this is?
a) addition
b) displacement
c) endothermic
d) exothermic
Baking of cake is ……..reaction.
a) addition
b) displacement
c) endothermic
d) exothermic
Which of the following are used to treat injuries such as muscles sprains and strains?
a) warm bags
b) cold packs
c) heating bags
d) all of these
Cold packs contain ingredients which when mixed cause an/a ………..reaction.
a) addition
b) displacement
c) endothermic
d) exothermic
Drop in temperature by the cold packs reduce
a) pain
b) swelling
c) respiration
d) both a and b
Chemical Bonds:
A chemical bond is a lasting attraction between
atoms, ions or molecules that enables the formation of chemical compounds. The
bond may result from the electrostatic force between oppositely charged ions as
in ionic bonds or through the sharing of electrons as in covalent bonds.
