Will you please give me question paper for IIT JEE physic entrance examination in PDF file format as soon as possible ?

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3. Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for
Sb2S2 sol is
(A) Na2SO4 (B) CaCl2
(C) Al2(SO4)3 (D) NH4Cl
Key. (C)

4. The Henry’s law constant for the solubility of N2 gas in water at 298 K is 1.0 × 105 atm. The mole fraction
of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atm
pressure is
(A) 4.0 × 10–4 (B) 4.0 × 10–5
(C) 5.0 × 10–4 (D) 4.0 × 10–6
Key. (A)

5. The reaction of P4 with X leads selectively to P4O6. The X is
(A) Dry O2 (B) A mixture of O2 and N2
(C) Moist O2 (D) O2 in the presence of aqueous NaOH
Key. (B)

7. Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular
force of attraction is weakest is
(A) Nylon (B) Poly(vinyl chloride)
(C) Cellulose (D) Natural Rubber
Key. (D)

9. The correct statement(s) regarding defects in solids is(are)
(A) Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion
(B) Frenkel defect is a disolocation defect
(C) Trapping of an electron in the lattice leads to the formation of F-centre
(D) Schottky defects have no effect on the physical properties of solids
Key. (B, C)
Sol. Frenkel defect is usually favoured by a very large difference in the sizes of cation and anion. In Schottky
defect pairs of cations and anions left the crystal lattice as a result density decreases. Hence (B) and (C) are
correct.

10. The compound(s) that exhibit(s) geometrical isomerism is(are)
(A) [Pt(en)Cl2] (B) [Pt(en)2]Cl2
(C) [Pt(en)2Cl2]Cl2 (D) [Pt(NH3)2Cl2]
Key. (C, D)

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