Question

hii guys plz answer those all



spam answers will report soon​

Answer 1

Answer:

write this I am sending others

18.

For MgO

Magnesium is the 12th element of the periodic table having 12 electrons. The electronic configuration of this element is 1s^22s^22p^63s^21s22s22p63s2

This will loose 2 electron to form Mg^{2+}Mg2+ ion.

Oxygen is the 8th element of the periodic table having 8 electrons. The electronic configuration of this element is 1s^22s^22p^41s22s22p4

This will gain 2 electrons to form O^{2-}O2− ion.

To form MgOMgO compound, 1 magnesium ion is needed to neutralize the charge on oxygen ion.

9.TH

This oxide reacts with base and acid to produce salt and water as the main products.

Amphoteric oxides react with both acids and alkalis to form salt and water. Examples of amphoteric oxides are zinc oxide and aluminum oxide.

ZnO(s) + 2HCl(aq) →  ZnCl2(aq) + H2O(l)

ZnO(s) + 2NaOH(a) → Na2ZnO2(aq) + H2O(l)

Al2O3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2O(l)

Al2O3(s) + 2NaOH(aq) → 2NaAlO2(aq) + H2O(l)

14.th

A thermite reaction (a type of aluminothermic reaction) is one in which aluminium metal is oxidized by an oxide of another metal, most commonly iron oxide. Although the reactants are stable at room temperature, when they are exposed to sufficient heat to ignite, they burn with an extremely intense exothermic reaction. 

reaction

FE2O3 + 2 AL –> AL2O3 + 2 FE