1. 1000C
2. 780C
3. 860C
4. 340C
34<sup>0</sup>C
1. O3
2. moisture
3. dry air
4. sunlight
moisture
1. bromine, 2-bromoaniline
2. bromine, 2,4,6-tribromoaniline
3. chloroform | KOH, phenyl cyanide
4. acetyl chloride, benzanilide
bromine, 2,4,6-tribromoaniline
1. Conc-H2SO4/700C
2. Dil-H2SO4/l400C
3. Dil.H2SO4/1000C
4. Conc.H2SO4 / l700C
Conc.H<sub>2</sub>SO<sub>4</sub> / l70<sup>0</sup>C
1. C2H5Cl, anhydrous AlCl3
2. C2H5Cl, aqueous AlCl3
3. C2H5OH, anhydrous AlCl3
4. C2H5Cl, SOCl2
C<sub>2</sub>H<sub>5</sub>Cl, anhydrous AlCl<sub>3</sub>
1. H2O
2. H2Te
3. H2S
4. H2Se
H<sub>2</sub>Te
1. CH3CH2CH (OH) CHO
2. CH3CH (OH) CH2CHO
3. CH3CH (OH) COCH3
4. CH3CH2CH2CHO
CH<sub>3</sub>CH (OH) CH<sub>2</sub>CHO
1. Smoke
2. Gold sol
3. Starch aqueous solution
4. Cloud
Starch aqueous solution
1. CH3COOC2H5
2. C2H5OC2H5
3. CH3OCH3
4. CH3CH2CHO
CH<sub>3</sub>COOC<sub>2</sub>H<sub>5</sub>
1. K2O, H2O
2. H2, H3BO3
3. H2O, KBO2
4. B2O3, H3BO3
H<sub>2</sub>O, KBO<sub>2</sub>