Q.What is qualitative analysis?

  • The type of analysis that deals with the methods which are used to determine the constituents of a compound.

Q.What is a radical?

  • A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical reactions.

Q.What are acidic and basic radicals?

  • Radicals carrying positive charge are called basic radicals and those carrying negative charge are called acidic radicals.

Q.What type of bond is present in an inorganic salt?

  • Electrovalent bond.

Q.Why do inorganic salts ionize when dissolved in water?

  • Due to the high dielectric constant of water, the force of attraction holding the two ions in a salt decreases. Thus, the two ions separate. The ions are further stabilized by solvation.

Q.Give examples of some colored basic radicals.

  • Cu2+, Fe2+, Fe3+, Cr3+, Ni2+, Co2+and Mn2+.

Q.What is the color of iron salts?

  • Ferrous salts are usually light green while ferric salts are generally brown.

Q.Name any iron salt which is light green.

  • Ferrous sulphate.

Q.What is the color of nickel salts?

  • Bluish green or green.

Q.What is the color of manganese salts?

  • Light pink or flesh color.

Q.Name the basic radicals which are absent, if the given salt is white.

  • Cu2+, Fe2+, Fe3+, Cr3+, Ni2+, Co2+and Mn2+.

Q.Why a salt containing lead turn black in color, when placed for a long time in laboratory?

  • Due to the formation of black lead sulphide by the action of H2S in atmosphere.

Q.Name the salts which produce crackling sound when heated.

  • Lead nitrate, barium nitrate, potassium bromide, sodium chloride.

Q.What is sublimation?

  • It is the process by which a salt directly changes into gaseous phase without melting, when heated. On cooling vapors condense back to the solid state.