Question

math ch 11 .2 questions number 3
class seventh NCERT solutions
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Answer 1

Answer:

Mining. Fishing ; (i) Since ancient times man is using minerals as raw material. (i) Since ancient time man is using fish as a food. ; (ii) Found naturally in ...

(ii) Found naturally in crust of the earth: (ii) Found naturally but in rivers, lakes, seas ...

(iv) Highly uneven distribution: (iv) Found everywhere in waterbodies

(iii) Used as industrial raw materials: (iii) Used as a food

Step-by-step explanation:

I hope help you

Answer 2

Answer:

x 2 + 9x – 13 = 0

Step-by-step explanation:

coordination compound, any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands, joined to it by chemical bonds.