plz plz plz answer fast i have a test tomorrow

1.In [Ag(CN)2]-,the no of pia bond is

2.Among the following thevmolecule with highest dipole movement is

  • CCl4
  • NH3
  • H2O
  • CHCl3

3.the molecule with highest dipole movement is

  • CH3Cl
  • CH2Cl2
  • CH3Cl
  • CCl4

4.based on lattice energyand other consider-ations,which one of following alkali metal chlorides is expected to have highest melting point

  • LiCl
  • NaCl
  • KCl
  • RbCl

5.the type of hybrid orbital used by chlorine in ClO3 -is:

6.the hybridisation of oxygen in H2O2is

7.the percentage of p-character of hybrid orbitals in graphite and diamond are :

8.shape of O2F2 is similar to that of

  • C2F2
  • H2O2
  • H2F2
  • C2H2

9.If I2is dissolved in a aqueous KI,the intense yellow species,I3 -,Is formed .the structure of I3 -ion is

10.In which of following pairs the two species are isoelectrical

  • BrO3 -and XeO3
  • SF4andXeF4
  • SO3 2- and NO3 -
  • BF3 ANDNF3

I will answer three of your questions.


2. In the given below compounds CHCl3 has the highest dipole moment with value 1.87 and next comes the H2O with dipole moment value 1.85 then comes aNH3 with value 1.47 and CCl4 with dipole moment 0.


4. NaCl has the highest melting point. Although lattice energy of LiCl higher than NaCl but LiCl is covalent in nature and NaCl ionic and the melting point decreases as we move NaCl because the lattice energy decreases as a size of alkali metal atom increases (lattice energy is directly proportional to melting point of alkali metal halide).


9. The structure of triiodide is given below. The ion is linear and symmetrical. According to VSEPR theory, the central iodine atom has three equatorial lone pairs, and the terminal iodines are bonded axially in a linear fashion, due to the three lone-pairs bonding to the central iodine-atom. Iodine does not follow the octet rule. It will hold more than 8 electrons. Iodine having valence electrons in the 4th energy level will also have access to the 4d sublevel, thus allowing for more than 8 electrons. I3- is dsp3 hybridized and contains 3 lone pairs and 2 bonding pairs of valence electrons around the Iodine.

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