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1. 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
2.

The correct acidity order of the following is
JEE_IIT_2009_question_paperII_with_answer_on_testveda_test_veda_q2

A (III) > (IV) > (II) > (I)
B (IV) > (III) > (I) > (II)
C (III) > (II) > (I) > (IV)
D (II) > (III) > (IV) > (I)
3. 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
4. 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
5. Given that the abundances of isotopes 54Fe, 56Fe and 57Fe are 5%, 90% and 5% respectively, the atomic mass of Fe is
A 55.85
B 55.95
C 55.75
D 56.05

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