Question

(a) Name an acid which helps in the preservation of food. How does it work?(b) What property do all elements in same column of the periodic table as boron have in common?

Answer 1

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(a) Acetic acid is the acid used in prservation of food.

(b) In group of boron, all elements will have same valence electrons number, i. e, 3.

Besides, there are many other same things in elements ina group.

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