Chemistry

If a solid directly converts to gas on heating and the gas directly converts to solid on cooling, this phenomenon is called sublimation.

The volume of one mole of a substance is called the molar volume.

Compressed methane gas at high pressure is called CNG or Compressed Natural Gas.

Silver nitrate solution in the basic medium is called “Tollen’s reagent”.

At normal pressure, the temperature at which a liquid matter turns into a gaseous state is called the boiling point of that liquid. For example, the Melting point of NaCl is 1465°C.

The number of protons in the nucleus of the atom of an element is called the atomic number of those elements. We know that protons are present in the nucleus of an atom. It is the number of protons of an atom, which determines its atomic number. It is denoted by ‘Z’. All atoms of an element have the … Read more

The abbreviated form of English or the Lain name of an element is called its symbol.

The sign denoting excessive harmful radioactive emission is called trefoil.