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Q1
short answer
Propanal to Propane
Q2
short answer
Ethanal to But-2-enal
Q3
short answer
Ethanoic acid to ethanamide
Q4
short answer
rate of reaction, and
Q5
short answer
rate of disappearance of H2 (g).
Q5
short answer
3 marks
Calculate the emf of the following cell : Zn (s)|Zn2+ (0·01 M) || (0·001 M) Ag+|Ag (s) Given : Zn/Zn2+ E = 0·76 V and Ag+/Ag E = + 0·80 V [log 2 = 0·3010, log 3 = 0·4771, log 10 = 1]
Q6
short answer
Calculate the degree of dissociation ( ) of CH3COOH if and of CH3COOH are 48 S cm2 mol 1 and 400 S cm2 mol 1respectively.
Q7
short answer
3 marks
Write the hybridisation and magnetic character of the following complexes : (i) [NiCl4]2- (ii) [Co(NH3)6]3+ (iii) [FeF6]3- [Atomic number : Ni = 28, Co = 27, Fe = 26]
Q7
short answer
3 marks
EH$ àW_ H$mo{Q> H$s A{^{H«$`m H$mo 75% {d`moOZ hmoZo _| 30 {_ZQ> bJVo h¢ & t1/2 H$s JUZm H$s{OE & 3{X`m J`m h¡ : [log 2 = 0·3, log 3 = 0·48, log 4 = 0·6, log 5 = 0·7]
Q7
short answer
3 marks
A first order reduction takes 30 minutes for 75% decomposition. Calculate t1/2. Given : [log 2 = 0·3, log 3 = 0·48, log 4 = 0·6, log 5 = 0·7]
Q8
short answer
3 marks
(i) Write the IUPAC name of the following complex : [Co(NH3)4(H2O)Cl]Cl2 (ii) What is the difference between an Ambidentate ligand and a Bidentate ligand ? (iii) Out of [Fe(NH3)6]3+ and [Fe(C2O4)3]3-, which complex is more stable and why ?
Q11
short answer
1 mark
Write the major products in the following : (i)
Q12
short answer
Oxidation of propanal is easier than propanone. Why ?
Q13
short answer
How can you distinguish between Acetophenone and Benzophenone ?
Q14
short answer
1 mark
Draw the structure of the following derivative : 2,4-Dinitrophenylhydrazone of Propanone
Q16
short answer
3 marks
Write three differences between Lyophobic sol and Lyophilic sol.
Q17
short answer
What is the cause of Brownian movement in colloidal particles ?
Q18
short answer
1 mark
Why does physisorption decrease with increase in temperature ?
Q19
short answer
1 mark
Why is E°(Mn2+/Mn) value highly negative as compared to other elements?
Q20
short answer
1 mark
What is the reason for the irregularity in the above E° values?
Q21
short answer
1 mark
Why is E°(Cu2+/Cu) value exceptionally positive?
Q22
short answer
1 mark
Write the equation involved in the following reactions: Rosenmund reduction
Q23
short answer
3 marks
Which acid of each pair would you expect to be stronger ? Give reason. (I) CH3COOH or FCH2COOH (II) OH or CH3COOH
Q24
short answer
Distinguish between Pentan-2-one and Pentan-3-one.
Q25
short answer
1 mark
Account for the following: Transition metals and their compounds show catalytic activities.
Q26
short answer
1 mark
Account for the following: Zn, Cd and Hg are non-transition elements.
Q27
short answer
1 mark
Account for the following: Zr and Hf are of almost identical atomic radii.
Reading Passage
Amines constitute an important class of organic compounds derived by replacing one or more hydrogen atoms of ammonia molecule by alkyl/aryl groups. Amines are usually formed from nitro compounds, halides, amides, etc. They exhibit hydrogen bonding which influences their physical properties. Alkyl amines are found to be stronger bases than ammonia. In aromatic amines, electron releasing and withdrawing groups, respectively increase and decrease their basic character. Reactions of amines are governed by availability of the unshared pair of electrons on nitrogen. Influence of the number of hydrogen atoms at nitrogen atom on the type of reactions and nature of products is responsible for identification and distinction between primary, secondary and tertiary amines. Reactivity of aromatic amines can be controlled by acylation process.
Q28
short answer
1 mark
Why does aniline not give Friedel-Crafts reaction ?
Q29
short answer
1 mark
Arrange the following in the increasing order of their pKb values : C6H5NH2 , NH3 , C2H5NH2 , (CH3 )3N
Q30
short answer
1 mark
How can you distinguish between CH3CH2NH2 and (CH3CH2 )2NH by Hinsberg test ?
Q31
short answer
2 marks
(a) Write the structures of A and B in the following reactions : (I) NO2 A B (II) CH3CH2CONH2 A B OR (b) How will you convert the following : (I) Benzoic acid to aniline (II) Aniline to p-bromoaniline
