How is ionic bond formed in sodium fluoride? (The atomic number of F and Na are 9 and 11 respectively). OR C has 4 electrons in its outermost shell and O has 6 electrons in its outermost shell. Draw the Lewis dot diagram of CO2 molecule.

What type of chemical bond is present in MgCl2? How are the chemical bonds formed in MgCl2? (Atomic number of Mg and Cl are 12 and 17 respectively). [1+2] OR Explain why an aqueous solution of sodium chloride is the conductor of electricity but the aqueous solution of sugar or glucose is not. [3]

Show by the help of a property of sodium chloride that sodium chloride is composed of ions. OR Show how ionic bond is formed in sodium chloride. (Atomic numbers of Na and Cl are 11 and 17 respectively)

Show by drawing a Lewis dot diagram of CH4 that CH4 is formed by covalent bonds. (Atomic numbers of H and C are 1 and 6 respectively)

Distinguish between naphthalene and sodium chloride by two physical properties.

Liquid hydrogen chloride is unable to conduct electricity, but molten sodium chloride is able to conduct electricity — explain

Explain why the melting point of sodium chloride is much greater than that of glucose.

Draw electron-dot structure of calcium oxide. [Atomic numbers of Ca and O are 20 and 8 respectively]

How many covalent bonds are present in CHCl3 molecules?

Give an example of a covalent liquid.

The electronic configuration of a hydride ion (H-) is like the electronic configuration of the atom of which element? [1] OR Draw the Lewis dot diagram of H2 molecule. [1]

(c) Sodium fluoride Explanation: Sodium fluoride (NaF) is an ionic compound, meaning it exists as a lattice of ions rather than discrete molecules. In contrast, sugar, glucose, and hydrogen chloride can form molecular structures.