如右图所示,过氧化氢(H2O2)在催化剂二氧化锰的作用下, 迅速分

如右图所示,过氧化氢(H2O2)在催化剂二氧化锰的作用下,

迅速分解放出大量的氧气,下列现象正确的是

A. 气球胀大,红墨水左移        B. 气球缩小,红墨水右移               

C. 气球胀大,红墨水右移        D. 气球缩小,红墨水左移

答案

D

相关题目

1. Mrs. Green doesn’t want ___ (this) socks. 2. Helen ___ (want) to go to sch
1. Mrs. Green doesn’t want ___ (this) socks. 2. Helen ___ (want) to go to school on foot. 3. My sister ___ (not) know what it is. 4. ___ (that) books are in English.   1. these 2. wants 3. does
能证明苯酚具有弱酸性的实验是(    ) A.加入浓溴水生成
能证明苯酚具有弱酸性的实验是(    ) A.加入浓溴水生成白色沉淀 B.苯酚钠溶液中通入CO2后,溶液由澄清变浑浊 C.浑浊的苯酚加热后变澄清 D.苯酚的
With the worldwide oil crisis, the price of oil has been raised ______ 15%.  
With the worldwide oil crisis, the price of oil has been raised ______ 15%.       A. about B. with C. of D. by
下列函数,既是奇函数,又在区间(0,+∞)上是减函数的是(
下列函数,既是奇函数,又在区间(0,+∞)上是减函数的是( ) A.f(x)=-x2                  B.f(x)= C.f(x)=                      
 Left ____ in the reading room alone quite by accident, the boy felt nervous.
 Left ____ in the reading room alone quite by accident, the boy felt nervous. A. locking     B. having locked    C. to lock     D. locked
Now that you have accepted the task, the only thing you can do now is ______ on
Now that you have accepted the task, the only thing you can do now is ______ on how to fulfill it. A. reflect                      B. try                     
往溴水中加入下列物质,不能使溴水的颜色变为无色的是A.加
往溴水中加入下列物质,不能使溴水的颜色变为无色的是A.加入CCl4多次萃取B.加入适量的镁粉C.加入适量KI溶液D.加入适量的K2CO3溶液
以“奇迹”为中心,以对比的方式,写一段话,表达具有一
以“奇迹”为中心,以对比的方式,写一段话,表达具有一定的哲理意义,文字不少于70字。  

最新题目