Download Practice Paper - 3

Practice Paper - 3
Q1
Give the IUPAC name of the following compound.
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Q2
Write the balanced equation for complete hydrolysis of XeF6.
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Q3
What are shape selective catalysts?
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Q4
Write the structure of
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Q5
What is the two-dimensional coordination number of a sphere in square close packing?
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Q6
What is the Vant’ Hoff factor for a compound, which undergoes tetramerization in an organic solvent?
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Q7
What is the role of depressant in froth floatation process?
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Q8
Why H3PO3 is diprotic?
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Q9
What are non-ideal solutions deviate? Give one example. Explain as to why non-ideal solution derivate from Raoult’s Law.
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Q10
For a chemical reaction, what is the effect of a catalyst on the following?
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(a) Activation energy of the reaction. (b) Rate constant of the reaction.
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Q11
State the basis of refining a substance by chromatographic method. Under what circumstances is this method especially useful?
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Q12
Mention the type of linkages responsible for the formation of the following.
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4 – Methyl Pent –3en –2one.
(i) Primary structure of proteins(ii) Cross-linking of poly peptide chains(iii)  - Helix formation(iv)  - Sheet structure
Q13
Explain the amphoteric behavior of amino acids.
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Q14
Describe the mechanism of de hydration of alcohols.
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Q15
Write the following name reaction. (a) Carbylanine reaction. (b) Hoffmann bromamide reaction.
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Q16
Give one chemical test each to distinguish between following pairs of compound.
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(a) Aniline and N-methy L aniline (b) PhenoL andd BenzyL alcohol
Q17
Q18
Q19
Five reason for the following (a) Grignard reagents should be prepared under an hydrous condition?
(b) Ethanol has higher B. P. in comparison to methoxy methane.
OR
(a) Explain how does the –OH group attached to a carbon of benzene ring , activate it towards electrophilic substitution?
(b) Alcohols are comparatively more soluble in water than hydrocarbon of comparable molecular masses.
An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent.
What is the molar mass of the solute? Vapour pressure of pure water at 100 o C = 1.013 bar.
Lithium metal crystal has body centred cubic structure. Its density is 0.53 gm/cm3 and its molar mass is 6.94 gm/mol.
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Calculate the volume of a unit cell of lithium metal. [NA=6.023x10 ]
Q20
Write the names and structure of the monomers of the following polymers. (1) Buna-s (2) Buna-N (3) Dacron
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Q21
(a) Draw the structure and write the hybridization state of CO in Cis - [CO(NH3)4Cl2]+
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(b) Write the IUPAC name of linkage isomer of following complex
Q22
[Co(NH3)4Cl (ONO)]Cl
(a) What are emulsion? What are their different types?
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(b) What is an adsorption isotherm? Describe Freundlich adsorption isotherm.
Q23
(a) What happens when Cl2 reacts with hot and concentrated solution of sodium hydroxide?
(b) Why H3Po2 and H3Po3 act as good reducing agents while H3Po4 does not.
(c) Why the basic character among the hydrides of group 15 elements decreases with increasing atomic number?
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Q24
The rate of a reaction quadruples when the temperature changes from 293K to 313 K. calculate the energy of activation
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of the reaction assuming that it does not change with temperature. [R=8.314 Joule]
Q25
Give reasons for the following.
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(a) The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride.
(b) Out of C6H5CH2Cl and C6H5 CHClC6H5. Which is more easily hydrolysed by aqueous KOH?
(c) Alkyl halides though polar are immisible with water?
Q26
Give reasons for the following (a) Why does PCl3 fuse in moisture? (b) Which form of sulphur shows paramagnetic behaviour? (c)
Halogens have maximum negative electron gain enthalpy in the respective periods in the periodic table. Why?
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OR
(a) Mention the conditions required to maximize the yield of ammonia?
(b) H2S is less acidic than H2 Te why?
(c) When HCl reacts with finely powdered iron it forms ferrous chloride not ferric chloride , why?
Q27
Q28
What are antibiotics? Distinguish between narrow spectrum and broad spectrum antibiotics. Clasify the following into
Bactericidal and Bacteriostatic antibiotics.
An organic compound A (C3H6O) is resistant to oxidation but form compound B (C3H8O) on reduction B reacts with
HBr to form the compound C. C with Mg form Gignard Reagent D which reacts with A to form a product which on
hydrolysis gives E. Identify A to E.
OR
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Identify A to E in the following series of reaction
Q29
(a) Explain why electrolysis of an aquous solution of NaCl gives H2 at cathode and Cl2 at anode . Given
o
+
o
o
-
E Na /Na = -2.17 V, E H2O/H2 = -0.83 V, E Cl2/2Cl = +1.36 V
o
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+
E 2H /1/2O2/H2O = +1.23 V
(b) The resistence of a conducting cell when filled with .05 solution of an electrolyte X is 100 ohm at 40oC . The same
conductivity cell filled with 0.01 M solution of electrolyte Y has a resistance of 50 ohm . The conductivity of 0.05 M
solution of electrolyte X is 1.0 x 10–4 S cm-1 . Calculate
(i) Cell Constent , (ii) Conductivity of 0.01 Y solution , (iii) Molar conductivity of 0.01 M Y solution
OR
Q30
(b)
(a) State Kohlrausch’s law of independent migration of ions. How can the degree of dissociation of acetic acid in a
solution be calculated from its molar conductivity data?
(b) (i) Formulate the electrochemical cell representing the reaction
2Cr(s) + 3Fe+2 (aq)  2Cr+3(aq) + 3Fe(s)
(ii) Calculate Eo Cell
o
+3
(iii) Calculate Ecell at 25 C If [Cr ] = 0.1M & [Fe+2]=0.01 M [ Given Eo Cr+3/Cr = -0.74 V, Eo Fe+2/Fe = -0.44V]
(a) Give reasons for the following
(i) Actinoid contraction is greater from element to element than lanthanoid contraction why?
(ii) Though a transition element Scandium (Z=21) does not exhibit variable oxidation states
(i) Describe how potassium dichromate is prepared from sodium chromate.
(ii) The colour of potassium dichromate solution changes with the change of pH of the solution explain how?
OR
(i) What is lanthanoid contraction and what are its consequences?
(ii) Use Hund’s rule to derive the electronic configuration of Ce +3 ion and calculate its magnetic moment by using ‘spin
only’ formula. [Z=58]
(iii) Why d-block elements form complex compounds?
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