1. reduced to half
2. reduced to one-fourth
3. increased four times
4. increased two times
increased four times
1. sodium silicate
2. silicon carbide
3. silicon
4. silica
silica
1. Ethene
2. Propyne
3. Propene
4. Propane
Propane
1. 2
2. 1
3. 1.7
4. 0.3
1
1. NH3
2. NH4+
3. N2H4
4. NH2OH
NH<sub>3</sub>
1. Anilineum chloride
2. CHCl3
3. CCl4
4. CH3Cl
Anilineum chloride
1. Boron
2. Carbon
3. Nitrogen
4. Oxygen
Nitrogen
1. Cl-
2. Ar
3. K-
4. Ca2+
Cl-
1. NH2OH
2. NaHSO3
3. iodine
4. 2,4-DNP
2,4-DNP
1. sp
2. sp2
3. sp3
4. sp3d
sp3