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CBSE Guess > Papers > Question Papers > Class XII > 2004 > Chemistry > Delhi Set-III

CHEMISTRY (Set III—Delhi)

Except for the following questions, all the remaining questions have been asked in Set I and Set II.

Q. 1. What makes alkali metal halides sometimes coloured, which are otherwise colourless? 1

Q. 2. State Henry's law about the solubility of a gass in a liquid. 1

Q. 3. Define the order of a reaction. 1

Q. 6. What is meant by entropy driven reaction? How can a reaction with positive changes of enthalpy and entropy be made entropy driven? 2

Q. 7. Give chemical evidence for each of the following: 2
(i) Fluorine is a stronger oxidising agent than chlorine.
(ii) +1 oxidation state is more stable for thallium than that for gallium.

Q. 13. Write the IUPAC name of [Co(en)2Cl2] CI and draw the structures of all the isomers with this formula of complex. 3

Q. 14. Describe the following in brief: 3
(i) Carbon dating
(ii) Thermonuclear reactions
(iii) Group displacement law

Q. 15. How are antiseptics distinguished from disinfectants? Give two examples of each. 3

Q. 25. (a) Assign appropriate reason for each of the following:
(i) Aluminium is highly electropositive yet It is used as a structural metal.
(ii) White phosphorus is much more reactive than red phosphorus.
(iii) Hydrogen fluoride is a much weaker acid than HCI in aqueous solution.
(iv) Sulphur in vapour state exhibits some paramagnetic behaviour.

(b) Draw the structure of SiF or XeF4 . 5
Chemistry 2004 Question Papers Class XII
Delhi Outside Delhi Compartment Delhi Compartment Outside Delhi
Indian Colleges Set I Indian Colleges Set I Indian Colleges Set I Indian Colleges Set I
Indian Colleges Set II Indian Colleges Set II Indian Colleges Set II Indian Colleges Set II
Indian Colleges Set III Indian Colleges Set III