- Hydrogen is explosive and Helium is inert in nature.
- If copper, aluminum, iron and lead are left in air, copper will rust.
- Pure water has a pH of 7.
- “Thermometer” is filled with material which should have low freezing point.
- Salt is also commonly known as “Table salt” and “Rock salt”.
- The chemical formula of “Common salt” is NaCl.
- Chemicals make the washing powder dry are sodium sulfate and sodium silicate.
- When carbon combines with oxygen it forms carbon dioxide, a gas which is extinguisher fire.
- The element symbol of hydrogen is “H”.
- Tritium, protium and deuterium are the isotopes of hydrogen.
- Hydrogen (H) is the most abundant element present in the universe.