将BaSO<sub>4</sub>与C通过加热反应生成BaS,这个热化学加工过的叫作:()
A、A.氯化焙烧
B、B.氧化焙烧
C、C.硫酸化焙烧
D、D.还原焙烧
A、A.氯化焙烧
B、B.氧化焙烧
C、C.硫酸化焙烧
D、D.还原焙烧
A、V<sub>1sub>与V<sub>4sub>导通,V<sub>2sub>与V<sub>3sub>关断 B、V<sub>1sub>常通,V<sub>2sub>常断,V<sub>3sub>与V<sub>4sub>交替通断 C、V<sub>1sub>与V<sub>4sub>关断,V<sub>2sub>与V<sub>3sub>导通 D、V<sub>1sub>常断,V<sub>2sub>常通,V<sub>3sub>与V<sub>4sub>交替通断
A、V<sub>1sub>与V<sub>4sub>导通,V<sub>2sub>与V<sub>3sub>关断 B、V<sub>1sub>常通,V<sub>2sub>常断,V<sub>3sub>与V<sub>4sub>交替通断 C、V<sub>1sub>与V<sub>4sub>关断,V<sub>2sub>与V<sub>3sub>导通 D、V<sub>1sub>常断,V<sub>2sub>常通,V<sub>3sub>与V<sub>4sub>交替通断
A、CaSO<sub>4sub>、CaCO<sub>3sub> B、BaSO<sub>4sub>、Agcl C、NaOH、Ca(OH)<sub>2sub> D、NaOH、CaCO<sub>3sub>
A、NaOH B、浓NH<sub>3sub>·H<sub>2sub>O C、NH<sub>4sub>Cl+NH<sub>3sub> D、稀NH<sub>3sub>·H<sub>2sub>O
A、Fe<sub>2sub>O<sub>3sub>·nH<sub>2sub>O B、Al(OH)<sub>3sub> C、Fe(OH)<sub>3sub> D、BaSO<sub>4sub>
A、Fe<sub>2sub>O<sub>3sub>+3H<sub>2sub>SO<sub>4sub>==Fe<sub>2sub>(SO<sub>4sub>)<sub>3sub>+3H<sub>2sub>O B、Cu(OH)<sub>2sub>+2HCl==CuCl<sub>2sub>+2H<sub>2sub>O C、CaCO<sub>3sub>+2HCl==CaCl<sub>2sub>+H<sub>2sub>O+CO<sub>2sub>↑ D、BaCl<sub>2sub>+H<sub>2sub>SO<sub>4sub>==BaSO<sub>4sub>↓+2HCl