Organic Chemistry — Chemistry STD 10 — Question

Give one test to distinguish between the following pair of chemicals.
Iron (III) Chloride solution and copper chloride solution.

Write the equations for the reactions, which takes place at the electrodes during the electrolysis of lead bromide?

State what do you observe ethene is bubbled through a solution of bromine in terachloromethane (carbon tetrachloride)

(a) Why is hydrogen ion called a proton? Explain.
(b) An atom of fluorine may be written as ₉F¹⁹. Using dot diagram to show electrons in the outermost shell, show how a molecule of fluorine (F₂) is formed? What is the name given to this kind of bonding?

The questions (i) to (v) refer to the following salt solutions listed (a) to (f):
(a) Copper nitrate
(b) Iron (II) sulphate
(c) Iron (III) chloride
(d) Lead nitrate
(e) Magnesium sulphate
(f) Zinc chloride
(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution ?
(ii) Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

Draw the electron dot diagram and structure of :
nitrogen molecule