1. H2SO4
2. H2SO3
3. SO2
4. H2SO6
H<sub>2</sub>SO<sub>3</sub>
1. 103
2. 104
3. 11280
4. 1128
10<sup>4</sup>
1. H2
2. CO
3. LiAlH4
4. H2 / Pd
CO
1. Fe2O3
2. Al powder
3. CaCN2 + C (graphite)
4. NaOH + CaO
CaCN<sub>2</sub> + C (graphite)
1. NO
2. NCl3
3. NOCl
4. NH4Cl
NOCl
1. Cr3+
2. Mn2+
3. Ni2+
4. Fe3+
Ni<sup>2+</sup>
1. Cyclohexane
2. 3, 3 dimeihyl pentane
3. 2, 2, 3 trimethyl pentane
4. n-heptane
2, 2, 3 trimethyl pentane
1. 5
2. 6
3. 12
4. 13
13
1. 40
2. 4
3. 0.4
4. 20
0.4
1. H2SO4
2. HNO3
3. HF
4. HCl
HF