Question

The secondary battery is such a battery………………
A) Which cannot be recharged
B) Which can be recharged
C) Which can be reused after replacing its chemical
D) Which is charged by primary cells

Answer 1

Hint:There are two kinds of batteries, namely primary battery and secondary battery. Primary batteries are those which are one time usable batteries whereas secondary batteries can be reused.

Complete step by step answer:
The secondary battery is such a battery which can be charged, discharged and then recharged many times. Many devices use this kind of batteries namely, lightweight electric cars, electrical bikes, phone batteries, rechargeable torches etc.
1) Lead acid batteries were the first rechargeable battery which contained liquid in an unsealed battery, they are heavier for the amount of electrical energy it can supply, but they are commonly used in electric vehicles because of the low cost of manufacturing.
2)Next the sealed lead acid batteries were invented which contain immobilized sulphuric acid electrolyte with decreased leakage and increased shelf life.
3)Later more sealed rechargeable batteries were found which include, nickel-cadmium, nickel- zinc, nickel hydride and lithium-ion cells.lithium-ion batteries are mostly used in mobile phones.
 Therefore, option B is correct.

Additional information: There is one more kind of battery called primary battery which cannot be recharged once it gets used up and the battery becomes dead. They are most commonly used in the devices which have low power drain and used when the power supply is away as in case of watches, communication circuits etc. most common examples are,
Zinc carbon battery( it's a dry battery which provide the voltage of around 1.5 v) and
Alkaline battery ( they provide the same voltage but have long shelf life and high energy density.

Note: We have seen our phone batteries (lithium- ion batteries) swell, this might be because of over charging which lead to unwanted reaction between the electrolyte and electrode releasing heat and gases, or may be because of cheap cell quality designed with low cathode to anode stoichiometric ratios. So secondary batteries shouldnt be overcharged.