1. PCl5
2. Cl2/red P
3. PCl3
4. SOCl2
Cl<sub>2</sub>/red P
1. C6H5N=NC6H5
2. C6H5NH2
3. C6H5NH-NHC6H5
4. C6H5NHOH
C<sub>6</sub>H<sub>5</sub>NH<sub>2</sub>
1. 6
2. 4
3. 8
4. 10
6
1. Cr3+, Fe3+
2. Fe3+, Mn2+
3. Fe3+, Co3+
4. Sc3+, Cr3+
Fe<sup>3+</sup>, Mn<sup>2+</sup>
1. 13
2. 2
3. 15
4. 3
2
1. 6C13
2. 6C12
3. 7N14
4. 7N15
<sub>7</sub>N<sup>14</sup>
1. Debye
2. Coulomb
3. Fermi
4. Tesla
Fermi
1. [He]2s1
2. [Ne]3s2
3. [Ne]3s23p2
4. [Ne]3s23p5
[Ne]3s<sup>2</sup>3p<sup>2</sup>
1. Sodium
2. Fluorine
3. Chlorine
4. Potassium
Chlorine
1. HF
2. H2O
3. CCl4
4. Salicylnldehyde
CCl<sub>4</sub>