In the year 2016, a mishap took place near Mahad in the Raigad district of Maharashtra. The 106 years old British-era bridge over the Savitri River collapsed into the river. Two buses carrying 22 people went missing after being swept away by the river. Navy divers, helicopter of Coast Guard began the rescue operation of the affected area. A 300 kg magnet was lowered into the swollen Savitri River by the rescue team. Why do you think the huge magnet was lowered into the river?

 to locate and possibly retrieve the buses

Explanation:

The buses are presumed to be made of steel. Presumably, a bus and the magnet are mutually attractive. The magnet could be used to locate a missing bus, and possibly retrieve it.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-