Question

class 11cbse Hindi core vs Hindi elective? what we the differences? also, if i choose either of them then can I write entrances like upsc? which one is easier? ​

Answer 1

The rule for writing chemical formula is as follow: Firstly, write the symbols with positive charge valency first. Secondly, write the valency of each atom on the top of its symbol. Thirdly, divide the valency number by their highest common factor ignore the positive or negative radicle.