AIEEE 2004 Paper With Solution

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AIEEE 2004

Sample Questions

Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers I =1 and 2 are respectively

12 and 4 (2) 16 and 5

16 and 4 (4) 12 and 5

Ans. 12 and 5

Which one the following ions has the highest value of ionic radius?

Li+ (2) F

(3) O2- (4) B3+

Ans. O2-

The wavelength of the radiation emitted, when in hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097×107 m-1)

(1) 91 nm (2) 9.1×10-8 nm

(3) 406 nm (4) 192 nm

Ans. 91 nm

The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is

(1) H2S < SiH4 < NH3 < BF3 (2) H2S < NH3 < BF3 < SiH4

(3) H2S < NH3 < SiH4 < BF3 (4) NH3 < H2S < SiH4 < BF3

Ans. H2S < NH3 < SiH4 < BF3

Which one the following sets of ions represents the collection of isoelectronic species?

(1) K+, Ca2+, Sc3+, Cl (2) Na+, Mg2+, Al3+, Cl

(3) K+, Cl, Mg2+, Sc3+ (4) Na+, Ca2+, Sc3+, Ans. K+, Ca2+, Sc3+, Cl

Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is

(1) SO2 < P2O3 < SiO2 < Al2O3 (2) Al2O3 < SiO2 < P2O3 < SO2

(3) Al2O3 < SiO2 < SO2 < P2O3 (4) SiO2 < SO2 < Al2O3 < P2O3

Ans. Al2O3 < SiO2 < P2O3 < SO2

The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statements is true for these two species?

Bond length in NO+ is greater than in NO

Bond length is unpredictable

Bond length in NO+ in equal to that in NO

Bond length in NO is greater than in NO+

Ans. Bond length in NO is greater than in NO+

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