Choose the correct statements among the following.

Q.

(a) What is the electronic configuration of (i) a sodium atom, and (ii) an oxygen atom?
(b) What is the number of outermost electrons in (i) a sodium atom, and (ii) an oxygen atom?
(c) show the formation of Na_2O by the transfer of electrons between the combining atoms.
(d) Why are ionic compounds usually hard?
(e) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state?

Q. (a) Show the formation of Na₂O by the transfer of electrons between the combining atoms.
(b) Why are ionic compounds usually hard?
(c) How is it that ionic compounds in the sold state do not conduct electricity but they do so when in molten state?
(d) What type of chemical bonds are present in CCl₄?
​(e) What type of chemical bonds are present in MgCl₂?

Q.

Question 30

Which of the following statements are not correct?

(a) NaCl being an ionic compound is a good conductor of electricity in the solid state

(b) In canonical structure there is a difference in the arrangement of atoms

(c) Hybrid orbitals form stronger bonds than pure orbitals

(d) VSEPR theory can explain the square planar geometry of $Xe{F}_4$

Q. Fill in the blanks in the following sentences:
(i) Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.
(ii) Two chlorine atoms combine to form a molecule. The bond between them is known as ..........
(iii) In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.
(iv) In forming N₂ molecule, .............. electrons are shared by each atom of nitrogen.
(v) The number of single covalent bonds in C₂H₂ molecule are ...........
(vi) Melting points and boiling points of ionic compounds are generally ............ than those of covalent compounds.

Q. Ionic compounds are good conductors of electricity in solid state.