您所在的当前位置：高中化学试题 >

铁

> 制印刷电路时常用氯化铁溶液作为“腐蚀液”，发生的反应为2FeCl 3+Cu====2FeCl 2+CuCl 2。向盛氯化铁溶液的烧杯中同时加入铁粉和铜粉，反应结束后，下列结果不可能出现的是 [ ] A.烧杯中有铜无铁 B.烧杯中有铁无铜 C.烧杯中铁、铜都有 D.烧杯中铁、铜都无

问题：

发布时间：2024-09-13

制印刷电路时常用氯化铁溶液作为“腐蚀液”，发生的反应为2FeCl ₃+Cu====2FeCl ₂+CuCl ₂。向盛氯化铁溶液的烧杯中同时加入铁粉和铜粉，反应结束后，下列结果不可能出现的是
[     ]
A.烧杯中有铜无铁
B.烧杯中有铁无铜
C.烧杯中铁、铜都有
D.烧杯中铁、铜都无

参考答案：

提问用户：Dg***x0J

可能感兴趣的题目：

1 My sister is ________ to go to school this year. A.old enough B.too older C.enough old D.so old
2 酒驾易造成交通事故，利用图示的电路可以检测司机是否酒驾．图中的R 1为定值电阻，R 2是一个“气敏传感器”，它的电阻值会随着其周围酒精蒸气的浓度增大而减小．检测时，喝了酒的司机对着气敏传感器吹气，则 A.电路的总电阻减小，电流表的示数减小 B.电路的总电阻减小，电流表的示数增大 C.电路的总电阻增大，电流表的示数增大 D.电路的总电阻增大，电流表的示数减小
3 有这样一段演绎推理：“有些复数是实数，c是复数，则c是实数”，则（　　） A．大前提错误 B．小前提错误 C．推理形式错误 D．.推理正确
4 —What do you think of the price of the computers at this store? —They are at least equal in price to, if not cheaper than, _____ at any other store. A．one B．ones C．that D．those
5 In 1971, a young man who grew up very poor was travelling across the country, trying to make a new __ 36__ for himself. Along the way, he had __ 37__ run out of money and was forced to spend the night in his car. This 38 until one morning, after a week of sleeping in his car, he walked 39 into a restaurant and ordered a big breakfast. After eating his first good meal in 40 , he found himself 41 to the waiter, telling him he had lost his 42 . The waiter, who was also the owner, walked 43 the chair where the young man had been sitting. He bent down, 44 a $20 bill that looked 45 it had fallen on the floor and said, “Son, you must have 46 this,” the owner said. The young man couldn’t believe his 47 ! He quickly paid for the breakfast, left a 48 , bought gas with the change, and headed West. On the way out of town, he began to understand 49 the fellow did. Maybe nobody dropped the money 50 . “Maybe that fellow just knew I was 51 and he helped me in a way that didn’t __ 52__ me.” Right then he made a promise to help others if he could. Later, he worked very hard and became a rich man. Now, he lives near Kansas City. Each year he 53 thousands of dollars. He is known as the “Secret Santa” because at 54 time each year, he personally hands money out to those on the streets and at hospitals. “I’ve lived the story, so I know it certainly more blessed（带来快乐的） to give than to ___ 55__, because it comes back to you many many times over,” he says. “It restores some faith in humanity.” 小题1: A．conclusion B．impression C．start D．surprise 小题2: A．unexpectedly B．completely C．strangely D．necessarily 小题3: A．continued B．began C．spread D．struggled 小题4: A．hopefully B．nervously C．carelessly D．excitedly 小题5: A．hours B．weeks C．years D．months 小题6: A．turning B．lying C．smiling D．joking 小题7: A．way B．job C．wallet D．car 小题8: A．behind B．near C．before D．under 小题9: A．took out B．picked out C．took up D．picked up 小题10: A．even if B．as if C．as well D．even so 小题11: A．placed B．put C．dropped D．removed 小题12: A．luck B．word C．promise D．action 小题13: A．message B．note C．mark D．tip 小题14:A. what B how C. where D. that 小题15: A．after all B．above all C．in all D．at all 小题16: A．in danger B．in pain C．in trouble D．in charge 小题17: A．astonish B．embarrass C．interest D．discourage 小题18: A．gives up B．sends out C．puts away D．gives away 小题19: A．breakfast B．Christmas C．church D．New Year 小题20: A．steal B．provide C．receive D．rob
6 如图所示的电路中，闭合开关，移动滑动变阻器的滑片，电流表的示数从0.5A变为0.8A，电压表的示数变化了3V，则该定值电阻所消耗功率的变化量为 A.3.9W B.2.4W C.1.5W D.0.9W
7 下列关于降水的说法，正确的是 A.降水就是指降雨 B.有雨必有云，有云就会下雨 C.降水是一种天文现象 D.降水包括雨、雪、冰雹等多种形式
8 He likes to help others, so he has ________ friends here. A.a little B.a few C.little D.few
9 将300mL 0.5mol/LNa 2CO 3溶液加水稀释到500mL，溶液中Na +的物质的量浓度为 [ ] A．0.3mol/L B．0.6mol/L C．0.03mol/L D． 0.06mol/L
10 某物体运动的速度一时间图象，由图可知（　　） A．0～2s物体匀速直线运动 B．2～6s物体静止 C．2～6s内物体的位移为8m D．0～2s内物体的加速度为1m/s2