Why are pentahalides more covalent than trihalides?
In pentahalides, the oxidation state is 5 and in trihalides, the oxidation state is 3. Since the metal ion with a high charge has more polarizing power, pentahalides are more covalent than trihalides.
1. A change in which no new substances are formed is called _____________.
2. Which of these acids is not organic in origin?
4. Biofertilizers convert nitrogen to ________ .
5. Ruby and sapphire are oxides of
6. Black lung disease occurs in people working in
8. The acid rain destroys vegetations because it contains