Thursday 20th February 2020
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?
(ii) H3 CCHCH2 CHCH3
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
(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
How does DNA replicate? Describe the mechanism of replication. How is the process responsible for preservation of heredity?
CBSE 2004 Question Papers Class XII