Draw an electron dot diagram of the structure of — hydronium ion. State the type of bonding present in it.

There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively. Give the molecular formula of the compound formed between E and G and state the type of chemical bond in this compound.

Among the compounds identify the compound that has all three bonds [ionic, covalent and coordinate bond].

1. Ammonia
2. Ammonium chloride
3. Sodium hydroxide
4. Calcium chloride

State which is not a typical property of an ionic compound?

1. High melting point.
2. Conducts electricity in molten and in the aqueous solution state.
3. Are insoluble in water.
4. Exist as oppositely charged ions even in the solid state.