1. Fermi
2. Farad
3. Curie
4. Hertz
Curie
1. 10-4
2. 10-8
3. 10-14
4. 10-12
10<sup>-12</sup>
1. Lyman
2. Balmer
3. Paschen
4. Brackett
Lyman
1. BeCl2
2. CO2
3. H2O
4. CH4
BeCl<sub>2</sub>
1. 185
2. 370
3. 555
4. 740
370
1. distillation
2. distillation at reduced pressure
3. sublimation
4. steam distillation
sublimation
1. 3
2. 4
3. 1
4. 2
2
1. Levigation
2. Electromagnetic separation
3. Floatation process
4. Roasting
Electromagnetic separation
1. 2CO(g)+O2(g)→2CO2(g) + 135.5kcal
2. C(diamond) + O2(g)→2CO2(g) + 94.5kcal
3. C(graphite)+O2(g)→CO2(g)+94.05kcal
4. CH4(g) + 2O2(g) → CO2(g)+ 2H2O(l)+212.8kcal
C(graphite)+O<sub>2</sub>(g)→CO<sub>2</sub>(g)+94.05kcal
1. dry ether
2. dry acetone
3. dry alcohol
4. none of these
dry ether