In O2 and H2O2 , the O-O bond lengths are 1.21 and 1.48 Å respectively. In ozone, the average O-O bond length is
1.28 Å
1.18 Å
1.44 Å
1.52 Å
Among [Fe(H2O)6]+, [Fe(CN)6]3-, [Fe(Cl)6]3- species, the hybridisation state of the Fe atom are, respectively.
d2sp3, d2sp3, sp3d2
sp3d2,d2sp3, d2sp3
sp3d2, d2sp3,sp3d2
None of the above
Which of the following pair have identical bond order?
CN- and NO+
CN- and O
CN- and CN+
NO+ and O
A.
CN- and NO+
For pairs having identical bond order, have identical number of electrons-
Number of electrons for CN- = 6 + 7 + 1 = 14
Number of electrons for NO+ = 7 + 8 - 1 = 14
Number of electrons for O = 8 + 8 + 1 = 17
Hence, CN- and NO+ have same bond order.
Which one of the following statements is correct?
Ferromagnetic substance like ZnFe2O4 becomes paramagnetic on heating
NaCl is a paramagentic salt
CuSO4 is a diamagnetic salt
MnO is an example of antiferronmagnetic substance
The bonds present in the structure of dichromate ion are
four equivalent Cr-O bonds only
six equivalent Cr-O bonds and one Cr - O - O bond
six equivalent Cr-O bonds and one O-O bond
eight equivalent Cr-O bonds
Match List-I and List-II and choose the correct matching codes.
List - I | List - II |
A. [Ni(CN)4]2- | 1. Ti4+ |
B. CHlorophyll | 2. sp3; paramagentic |
C. Ziegler- Natta catalyst | 3. non-planar |
D. [NiCl4]2- | 4. Mg2+ |
E. Deoxyhaemoglobin |
5. Planar 6. dsp2; diamagentic |
A - 6; B - 4; C - 1; D - 2; E - 3
A - 2; B - 4; C - 1; D - 6; E - 3
A - 2; B - 4; C - 1; D - 6; E - 5
A - 6; B - 4; C - 1; D - 2; E - 5