本课配套习题挑战模式1/5
单选题
难度系数:
1.下列措施是为了降低化学反应速率的是
A: 把石灰石固体研细后与盐酸反应 |
B: 食品放在冰箱中贮藏 |
C: 用MnO2作H2O2分解反应的催化剂 |
D: 铝和烧碱溶液反应时,稍微加热 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOaKiuefs+eBsOefs+WbuuS9k+eglOe7hu+8jOWinuWkp+aOpeinpumdouenr++8jOiDveWKoOW/q+WPjeW6lOmAn+eOhw==
- 提示2:IOWwhumjn+eJqei0ruiXj+WcqOWGsOeuseS4re+8jOa4qeW6pumZjeS9ju+8jOiDveWHj+aFouWPjeW6lOmAn+eOhw==
- 提示3:IOS6jOawp+WMlumUsOeyieacq+S9nOWCrOWMluWJgu+8jOiDveWKoOW/q+i/h+awp+WMluawoua6tua2suWItuawp+awlOeahOWPjeW6lOmAn+eOhw==
- 提示4:6ZOd5ZKM54On56Kx5Y+R55Sf5Y+N5bqU5pe277yM5Yqg54Ot77yM5Y2H6auY5rip5bqm5Lya5Yqg5b+r55Sf5oiQ5rCi5rCU55qE5Y+N5bqU6YCf546H
- 答案:Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.下列四个试管中,过氧化氢分解产生氧气的反应速率最大的是
- | 温度 | 过氧化氢溶液浓度 | 催化剂 |
A | 常温 | 3% | —— |
B | 水浴加热 | 3% | —— |
C | 水浴加热 | 6% | MnO2 |
D | 常温 | 6% | —— |
A: A |
B: B |
C: C |
D: D |
一次做对,真牛!
+5奖励规则>
- 提示1:IOa4qeW6pui2iumrmO+8jOWPjeW6lOmAn+eOh+i2iuWkp+OAgg==
- 提示2:IOi/h+awp+WMluawoua1k+W6pui2iuWkp+WPjeW6lOmAn+eOh+i2iuWkp++8mw==
- 提示3:IOacieWCrOWMluWJgueahOWPjeW6lOmAn+eOh+Wkp+S6juaXoOWCrOWMluWJgueahOOAgg==
- 答案:Qw==
5rC05rW05Yqg54Ot5Y+N5bqU6YCf546H5aSn5LqO5bi45rip77yM5LiU5rip5bqm6LaK6auY77yM5Y+N5bqU6YCf546H6LaK5aSn44CCPGJyPui/h+awp+WMluawoua1k+W6pui2iuWkp+WPjeW6lOmAn+eOh+i2iuWkp++8mzxicj7mnInlgqzljJbliYLnmoTlj43lupTpgJ/njoflpKfkuo7ml6DlgqzljJbliYLnmoTjgII=
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列实验中,能够达到预期目的是( )
编号 | 实验内容 | 实验目的 |
A | 在Na2SO3溶液中加入HNO3酸化的Ba(NO3)2,产生白色沉淀 | 检验Na2SO3是否变质 |
B | 将某气体通入品红溶液中,品红褪色 | 证明该气体是SO2 |
C | 用洁净的玻璃棒蘸取NaOH溶液,点在湿润的pH试纸上,与标准比色卡对照 | 测定NaOH溶液的pH |
D | 在两支试管中各加入4mL0.01mol/L的KMnO4酸性溶液,再分别加入0.1mol/LH2C2O4溶液2mL、0.2mol/LH2C2O4溶液2mL,分别记录溶液褪色所需时间 | 探究相同条件下,溶液浓度对反应速率的影响 |
A: A |
B: B |
C: C |
D: D |
一次做对,真牛!
+5奖励规则>
- 提示1:IOehnemFuOWPr+iusuS6muehq+mFuOmSoOawp+WMluS4uuehq+mFuOmSoO+8mw==
- 提示2:IOawouawp+WMluaAp+eahOeJqei0qOmDveWPr+S7peS9v+WTgee6ouikquiJsu+8jOmZpOS6jOawp+WMluehq+Wklui/mOacieawr+awlOetie+8mw==
- 提示3:IOawouawp+WMlumSoOWFt+acieiFkOiagOaAp++8jOS4jeiDveeUqHBI6K+V57q45p2l5qOA6aqM5YW26YW456Kx5oCn77yM5Lya5bCGcEjor5XnurjohZDomoA=
- 提示4:5LiN5ZCM5rWT5bqm55qE6I2J6YW45ZKM55u4562J5rWT5bqm55qE6auY6ZSw6YW46ZK+5Y+N5bqU77yM6I2J6YW45rWT5bqm6LaK5aSn5Y+N5bqU6YCf546H6LaK5b+r
- 答案:RA==
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
本课配套习题挑战模式4/5
单选题
难度系数:
4.假设C+CO22CO(正反应为吸热反应)的反应速率是v1,反应N2+3H22NH3(正反应为放热反应)的速率v2,当同时升高两反应的温度时,v1和v2的变化情况为
A: v1减v2增 |
B: 同时增大 |
C: 同时减少 |
D: v1增v2减 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWMluWtpuWPjeW6lOaXoOiuuuaYr+WQuOeDreWPjeW6lOi/mOaYr+aUvueDreWPjeW6lO+8jOa4qeW6puWNh+mrmO+8jOa0u+WMluWIhuWtkOeahOeZvuWIhuWQq+mHj+WinuWkp++8jOacieaViOeisOaSnueahOasoeaVsOWinuWkp++8jOWMluWtpuWPjeW6lOmAn+eOh+mDveWinuWkpy4=
- 答案:Qg==
5YyW5a2m5Y+N5bqU5peg6K665piv5ZC454Ot5Y+N5bqU6L+Y5piv5pS+54Ot5Y+N5bqU77yM5rip5bqm5Y2H6auY77yM5rS75YyW5YiG5a2Q55qE55m+5YiG5ZCr6YeP5aKe5aSn77yM5pyJ5pWI56Kw5pKe55qE5qyh5pWw5aKe5aSn77yM5YyW5a2m5Y+N5bqU6YCf546H6YO95aKe5aSnLiA8YnI+5pWF6YCJQi4g
本课配套习题挑战模式5/5
单选题
难度系数:
5.为了探究温度对化学反应速率的影响,下列实验方案可行的是
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOacrOmimOW6lOiAg+iZkeaOp+WItuWPmOmHj+eahOaAneaDs+OAgg==
- 答案:RA==
5o6i56m25rip5bqm5a+55YyW5a2m5Y+N5bqU6YCf546H55qE5b2x5ZON77yM6KaB55So5a+55q+U6K+V6aqM55qE5oCd5oOz5p2l5a6e546w44CCQemhueS4jeiDvei+vuWIsOebrueahOOAgjxicj7lj6blpJbopoHmjozmj6HmjqfliLblj5jph4/vvIzpmaTmuKnluqbmhI/lpJbnmoTmnaHku7bpg73lupTor6Xnm7jlkIzvvIzph4/or5Xpqozlj6rmnInmuKnluqbkuI3lkIzjgILmlYXpgInmi6lE6aG544CC