Why we make original solution in cations
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What is qualitative analysis ?
Ans. The type of analysis that deals with the methods which are used to determine the constituents of a compound.
2. What is a radical ?
Ans. A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical reactions.
3. What are acidic and basic radicals ?
Ans. Radicals carrying positive charge are called basic radicals and those carrying negative charge are called acidic radicals.
4. What type of bond is present in an inorganic salt ?
Ans. Electrovalent bond.
5. Why do inorganic salts ionise when dissolved in water ?
Ans. 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.
6. Give examples of some coloured basic radicals.
Ans.Cu2+,Fe2+, Fe3+, Cr3+, Ni2+, Co2+ and Mn2+.
7. What is the colour of iron salts ?
Ans. Ferrous salts are usually light green while ferric salts are generally brown.
8. Name any iron salt which is light green.
Ans. Ferrous sulphate.
9. What is the colour of nickel salts ?
Ans. Bluish green or green.
10. What is the colour of manganese salts ?
Ans. Light pink or flesh colour.
11. Name the basic radicals which are absent, if the given salt is white.
Ans. Cu2+,Fe2+, Fe3+, Cr3+, Ni2+, Co2+ and Mn2+.
12.Why a salt containing lead turn black in colour, when placed for a long time in labora-tory?
Ans. Due to the formation of black lead sulphide by the action of H2S in atmosphere.
13. Name the salts which produce crackling sound when heated.
Ans. Lead nitrate, barium nitrate, potassium bromide, sodium chloride.
14. What is sublimation ?
Ans. It is the process by which a salt directly changes into gaseous phase without melting, when heated. On cooling vapours condense back to the solid state.
Ans. The type of analysis that deals with the methods which are used to determine the constituents of a compound.
2. What is a radical ?
Ans. A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical reactions.
3. What are acidic and basic radicals ?
Ans. Radicals carrying positive charge are called basic radicals and those carrying negative charge are called acidic radicals.
4. What type of bond is present in an inorganic salt ?
Ans. Electrovalent bond.
5. Why do inorganic salts ionise when dissolved in water ?
Ans. 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.
6. Give examples of some coloured basic radicals.
Ans.Cu2+,Fe2+, Fe3+, Cr3+, Ni2+, Co2+ and Mn2+.
7. What is the colour of iron salts ?
Ans. Ferrous salts are usually light green while ferric salts are generally brown.
8. Name any iron salt which is light green.
Ans. Ferrous sulphate.
9. What is the colour of nickel salts ?
Ans. Bluish green or green.
10. What is the colour of manganese salts ?
Ans. Light pink or flesh colour.
11. Name the basic radicals which are absent, if the given salt is white.
Ans. Cu2+,Fe2+, Fe3+, Cr3+, Ni2+, Co2+ and Mn2+.
12.Why a salt containing lead turn black in colour, when placed for a long time in labora-tory?
Ans. Due to the formation of black lead sulphide by the action of H2S in atmosphere.
13. Name the salts which produce crackling sound when heated.
Ans. Lead nitrate, barium nitrate, potassium bromide, sodium chloride.
14. What is sublimation ?
Ans. It is the process by which a salt directly changes into gaseous phase without melting, when heated. On cooling vapours condense back to the solid state.
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