Q.1. can you store lemon pickle in an aluminium utensil?explain
Q2. give reasons for the following.
a. aluminium foils are used to wrap food items.
b.immersions rods for heating liquid are made up of metalic substance.
c. copper cannot displace zinc from its salt solution.
d.sodium and potasium are stored in kerosene.
A.1 No, lemon pickle cannot be stored in an aluminium utensil as acids react with metals and form hydrogen gas thus spoiling the food.
A.2(a) Aluminium foils are used to wrap food items because they do not react with food items.
(b) Immersion rods for heating liquids are made up of metallic substances because they are good conductors of heat. So, liquid could be heated easily.
(c) Copper cannot displace zinc from its salt solution because copper is more reactive than zinc.
(d) Sodium and potassium are stored in kerosene because they are very reactive metals.They react vigorously with oxygen and water.A lot of heat is generated in the reaction.They are , therefore, stored in kerosene.