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 Multiple Choice QuestionsMultiple Choice Questions

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1.

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


2.

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


3.

Among the following, the molecule that will have the highest dipole movement is

  • H2

  • HF

  • HBr

  • HCl


4.

Which of the following pair have identical bond order?

  • CN- and NO+

  • CN- and O2-

  • CN- and CN+

  • NO+ and O2-


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5.

Identify the T-shaped molecule from the following.

  • BF3

  • NH3

  • NF3

  • CIF3


6.

Which one of the following statements is correct?

  • Ferromagnetic substance like ZnFe2O4 becomes paramagnetic on heating

  • NaCl is a paramagentic salt

  • CuSOis a diamagnetic salt

  • MnO is an example of antiferronmagnetic substance


7.

Among the following, the molecule of highest dipole moment is

  • CCl4

  • NH3

  • H2O

  • CHCl3


8.

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


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9.

The stablest radical among the following is

  • C6H5 - CH2C.H2

  • CH3C.H2

  • C6H5 - C.H2-CH3

  • CH3-C.H-CH3


10.

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


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