问题 填空题

如图是实验室常用来制备气体的装置,据此回答问题:

(1)A中用来放置药品的仪器______,(填名称,下同)用来加热药品的仪器______.

(2)现用高锰酸钾为原料制取较纯净的氧气,应用上图中的(填序号,下同)______发生装置和______收集装置组合,选择该组合的理由是______;A试管口应放一团棉花目的是防止______;A中发生的化学反应式为______;

(3)若用过氧化氢和二氧化锰来制取氧气应选上面的______发生装置与______或______收集收集装置,选择该组合的理由是______;B中所发生的反应方程式是______,其中二氧化锰是作______.

答案

(1)依据对仪器的认识以及仪器的用途解决.

故答案为:试管;酒精灯;

(2)制气装置的选择是依据反应物的状态与条件完成,高锰酸钾是固体且需要加热,生成的气体不溶于水,用排水发收集气体较纯净,所以应选AE组合,高锰酸钾制取氧气时常会带入高锰酸钾的固体颗粒,所以应选择使用高锰酸钾制氧气时常塞入棉花以净化产生的氧气.

故答案为:A;E;反应物是固体、且需加热的反应,生成的气体不易(或难)溶于水;加热时高锰酸钾粉末进入导管;2KMnO4

  △  
.
 
K2MnO4+MnO2+O2

(3)用过氧化氢和二氧化锰来制取氧气时,反应物是固体与液体,且不需加热可选制气装置是B,因其密度大于空气且不易溶于水所以可选收集装置是C或E,在该反应中二氧化锰是反应的催化剂.

故答案为:B;C;E;反应物为固体与液体,且反应不需加热,生成的气体密度比空气大且不易溶于水;

2H2O2

 MnO2 
.
 
2H2O+O2↑;催化剂;

填空题
阅读理解

The slavery drama “12 Years a Slave” won the Academy Award for best picture on Sunday, making history as the first movie from a black director to win the film industry's highest honor in 86 years of the Oscars.Can anyone tell me your ideas about this movie? —— GreatMartin

“12 Years a Slave is a surprisingly underwhelming movie.It is more of a string of picture about several heartless and evil white men(and women)who are just mean without the motivation of running a plantation on their minds.There is very little character development and most of the film relies on what the audience already knows and feels about slavery.” 一一GeminiJef

‘‘Never have I been stunned into an emotional silence after watching a film in the theater.I've come out of films before thinking” My god,that was unbelievable”,like when I saw The Lord of the Rings for the first time,but this film just hits you on another level entirely.You sit there after it’s over,wondering if what you’d just experienced was real.The day after.you feel the same.”一一Pauljohnson

“This movie is just an average movie about slavery.Are you kidding me,segregation movies are a dime a dozen and this movie beat out Gravity for Golden Globes? Gravity has never been done before.12 Years a Slave I watched once and will never watch again.I watched Gravity 5 times and still love it.’’一一Dominionator

“This movie was realistic and engaging at every second.Even the dramatic pauses were worthwhile and definitely not a waste of time.The script inferred and hinted at events rather than just plain saying them,and that was genius.Outstanding photography,amazing special effects and the acting is top notch.There were a few people that walked out during some scenes.What a shame!” 一一Apols

小题1:The main purpose of GreatMartin’s writing is __________ .

A.to give a brief introduction of the movie

B.to share his own opinions with others

C.to invite answers to his question

D.to explain why he asks the question小题2:The underlined word “stunned’’ in the third paragraph probably means __________ .

A.puzzled

B.shocked

C.disappointed

D.concerned小题3:Among the four speakers,who made positive comments on the movie?

A.GeminiJef and Pauljohnson

B.Pauljohnson and Dominionator

C.GeminiJef and Dominionator

D.Pauljohnson and Apols小题4:Which of the following best states Pauljotmson’s ideas about l2 Years a Slave?

A.It leaves little room for character development.

B.It reaches the height of The Lord of the Rings.

C.It doesn’t deserve such high praise.

D.It amazes the audience with its special effects.