What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

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Chapter 3

NCERT

Class 10

Science

Solutions

1. (i) Write the electron-dot structures for sodium, oxygen and magnesium. (ii) Show the formation of Na2O and MgO by the transfer of electrons. (iii) What are the ions present in these compounds?

Question:

(i) Write the electron-dot structures for sodium, oxygen and magnesium.

(ii) Show the formation of Na₂O and MgO by the transfer of electrons.

(iii) What are the ions present in these compounds?

Answer:

(i)

(ii)

(iii) In Na₂O, Na⁺ and O^2– ions are present.

In MgO, Mg²⁺ and O^2– ions are present.