Give scientific reasons: Carbon tetrachloride does not conduct electricity.
Carbon tetrachloride is made up of molecules and not free ions hence, it does not conduct electricity.
Bonding in which — (a) CCl4 (b) H2 (c) HCl (d) NH4Cl — involves coordinate bonding.
NH4Cl Reason - The bond formed between the nitrogen atom in ammonia and the chloride ion is a coordinate bond.
Give a reason why covalent compounds exist as gases, liquids or soft solids?
Covalent compounds exist as gases, liquids or soft solids as they have weak force of attraction between their molecules.
The molecule which contains a triple covalent bond is: (a) ammonia (b) methane (c) water (d) nitrogen
(d) Nitrogen Reason The valency of nitrogen element is 3. Nitrogen needs three electrons to attain stable octet structure of nearest noble gas - Ne [2,8]. Each of the two…
Compound X consists of only molecules. X will have — (a) A Crystalline hard structure (b) A low melting and boiling point (c) An ionic bond (d) A strong force of attraction between it’s molecules.
(b) A low melting and boiling point Reason There are weak Vander Waals forces of attraction between molecules. Thus, less amount of energy is required to break these forces of…
Compare carbon tetrachloride and sodium chloride with regard to solubility in water and electrical conductivity.
Carbon tetrachloride Sodium chloride Solubility in water Insoluble in water Soluble in water Electrical conductivity Non Conductor Good conductors in aqueous state or molten state
State which is not a typical property of an ionic compound? (a) High melting point. (b) Conducts electricity in molten and in the aqueous solution state. (c) Are insoluble in water. (d) Exist as oppositely charged ions even in the solid state.
(c) Are insoluble in water Reason Ionic compounds are soluble in water. They are insoluble in organic solvents. Water [polar solvent] has a high dielectric constant i.e. capacity to weaken…