IIT-JEE-Chemistry-Final Revision Set No.43

1,. The number of neutrons accompanying the formation of 139Xe54 and 94Sr38 from the absorption of a slow neutron by 235U92, followed by nuclear fission is :
(A) 0 (B) 2
(C) 1 (D) 3

2. The correct order of increasing C–O bond length of CO, CO2-3, CO2 is :
(A) CO2-3 < CO2 < CO (B) CO2 < CO2-3 < CO
(C) CO < CO2-3 < CO2 (D) CO < CO2 < CO2-3

3. The electrons, identified by quantum numbers n and l, (i) n = 4, l = 1, (ii) n = 4, l = 0, (iii) n = 3, l = 2, and (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as:
(A) (iv) < (ii) < (iii) < (i) (B) (ii) < (iv) < (i) < (iii)
(C) (i) < (iii) < (ii) < (iv) (D) (iii) < (i) < (iv) < (ii)


4. The coordination number of a metal crystallizing in a hexagonal close-packed structure is :
a. 12 b. 4 c. 8 d. 6

5. The normality of 0.3 M phosphorus acid (H3PO3) is
(a) 0.1 (b) 0.9
(c) 0.3 (d) 0.6

Source: 1999 JEE