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

CHEMISTRY (Set II—Delhi)

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

Q. 9. I dentify and indicate the presence of chirality, if any, in the following molecul-es. How many stereoisomers are possible for those containing chiral centres?
(i) 3-bromo-pent-1-ene
(ii) H₃ CCHCH₂ CHCH₃
                |              |
             OH          OH

Q. 17. Complete the following nuclear reactions: 3
(i) U + n --> Xe+.. +2 n

(ii) Mo+.. --> Tc+ n

(iii) CI+ n--> ..+ He

(Note: Put 'X' for the symbol of element where name of the element is not known)

Q. 19. (a) Give the IUPAC name of [Pt CI (NH₂CH₃ ) (NH₃ )₂ ] CI.
(b) Compare the magnetic behaviour of the complex entities [Fe (CN₆ ] ^4- and [Fe F6]^3- . (Fe=26) 3

Q. 20. Describe the following with suitable examples: 3
(i) Preservatives
(ii) Transquilizers
(iii) Hybrid propellants

Q. 25. (a) How would you account for the following:
(i) Cobalt ( II ) is stable in aqueous solution but In the presence of strong ligands it is easily oxidised. (Co=27)
(ii) The transition metals form interstitial compounds.
(iii) Silver halides find use in photography.
(b) What is lanthanoid contraction? Mention its main consequence. 5

Q. 27. (a) What is mutarotation? Explain occurrence of mutarotation in D-glucose.
(b) How are lipids classified? Give one example of each class. 5

Or

How does DNA replicate? Describe the mechanism of replication. How is the process responsible for preservation of heredity?

Chemistry 2004 Question Papers Class XII
Delhi		Outside Delhi		Compartment Delhi		Compartment Outside Delhi
	Set I		Set I		Set I		Set I
	Set II		Set II		Set II		Set II
	Set III		Set III