本课配套习题挑战模式1/5
单选题
难度系数:
1.类推思维是化学解题中常用的一种思维方法,下列关于化学反应方程式的类推正确的是
- | 已知 | 类推 |
A | 生石灰投入到水中 CaO+H2O===Ca(OH)2 | 氧化铜投入到水中 CuO+H2O===Cu(OH)2 |
B | 铁丝伸入到硫酸铜溶液中 Fe+CuSO4===FeSO4+Cu | 金属钠投入到硫酸铜溶液中 2Na+ CuSO4===Na2SO4+ Cu |
C | 小苏打受热分解 2NaHCO3Na2CO3+CO2↑+H2O | 碳酸氢钙受热分解 Ca(HCO3)2CaCO3+ CO2↑+ H2O |
D | 细铝丝在氧气中燃烧 4Al+3O22Al2O3 | 细铁丝在氧气中燃烧 4Fe+3O22Fe2O3 |
A: A |
B: B |
C: C |
D: D |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo5Yik5pat5YyW5a2m5pa556iL5byP55qE5Lmm5YaZ5pe277yM6aaW5YWI6KaB6ICD6JmR5piv5ZCm56ym5ZCI5Y+N5bqU5a6e6LSo44CC
- 提示2:5rOo5oSP5p+Q5Lqb54mp6LSo6IO95ZCm5Y+R55Sf5Y+N5bqU77yM5Lul5Y+K5YyW5a2m5Y+N5bqU5pa556iL5byP55qE5Y+N5bqU54mp5ZKM5Lqn54mp5piv5ZCm5q2j56Gu44CC
- 答案:Qw==
QSDmsKfljJbpk5zlkozmsLTkuI3lj5HnlJ/lj43lupTvvJs8YnI+QiDph5HlsZ7pkqDpnZ7luLjmtLvms7zvvIzkvJrpppblhYjlkozmsLTlj43lupTvvJs8YnI+RCDpk4HlnKjmsKfmsJTkuK3nh4Png6fnlJ/miJDlm5vmsKfljJbkuInpk4HjgII=
本课配套习题挑战模式2/5
单选题
难度系数:
2.科学家以二氧化碳和金属为原料,在一定条件下制得了金刚石,化学方程式为:
3CO2+4NaxR + C(金刚石),则x 、R为
3CO2+4NaxR + C(金刚石),则x 、R为
A: 1、Na2CO3 |
B: 2、Na2CO3 |
C: 4、Na2CO3 |
D: 2、Na2O2 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY5Li65LiN5a6M5pW05YyW5a2m5pa556iL5byP55qE5Lmm5YaZ77yM5Y+q6KaB5o6M5o+h6LSo6YeP5a6I5oGS5a6a5b6L5Y2z5Y+v44CC
- 答案:Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列用化学方程式表示的反应原理符合实验目的,且化学方程式书写正确的是
A: 制取少量的硫酸铜:Cu(NO3)2 + Na2SO4═══ CuSO4 + 2NaNO3 |
B: 用稀硫酸除去铁锈: Fe2O3 + 3H2SO4═══ Fe2(SO4)3 + 3 H2O |
C: 验证铜的金属活动性比银强:Cu +2 AgCl═══ CuCl2 + 2 Ag |
D: 除去硝酸钾溶液中混有的少量硫酸钾 K2SO4 + BaCl2═══ 2KCl+ BaSO4↓ |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY6ICD5p+l6L6D5Li657u85ZCI77yM6aaW5YWI6KaB55yL6aKY55uu5Lit5omA57uZ55qE5Y+N5bqU6IO95ZCm5Y+R55Sf44CC5rOo5oSP5aSN5YiG6Kej5Y+N5bqU5Y+R55Sf55qE5p2h5Lu25piv5pyJ5rC044CB5rKJ5reA5oiW5rCU5L2T5LiJ6ICF5LmL5LiA55Sf5oiQ44CC
- 提示2:6Zmk5q2k5LmL5aSW77yM6L+Y5raJ5Y+K5Yiw6Zmk5p2C55qE55u45YWz55+l6K+G77yM6Zmk5p2C5pe277yM5p2C6LSo6KaB6IO95aSf5YiG56a75Ye65p2l77yM5bm25LiU5LiN6IO95byV5YWl5paw55qE5p2C6LSo44CC
- 答案:Qg==
QSznlJ/miJDniankuK3msqHmnInmsonmt4DvvIzmsJTkvZPmiJbogIXmsLTmlYXplJnor6/vvJs8YnI+QuespuWQiOWPjeW6lOWOn+eQhuS5n+espuWQiOi0qOmHj+WuiOaBkuWumuW+i++8jOato+ehru+8mzxicj5D77yM5rCv5YyW6ZO25pys6Lqr5Li65LiN5rq25LqO5rC055qE5Zu65L2T77yM5Zug5q2k6ZOc5LiN6IO95LiO5YW25Y+R55Sf572u5o2i5Y+N5bqU77ybPGJyPkTmnInkuqfnlJ/mlrDnmoTnianotKjvvIzlm6DmraTnlKjmnaXpmaTmnYLlubbkuI3lkIjpgILjgII8YnI+5pWF6YCJQg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.某发电厂烟气处理的新工艺:CH4十2NO2= ==N2+X+2H2O,则X的化学式为
A: CO |
B: CO2 |
C: O2 |
D: C |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY6Zq+5bqm5LiN5aSn77yM55u05o6l5qC55o2u6LSo6YeP5a6I5oGS5a6a5b6L6L+b6KGM5o6o5pat5Y2z5Y+v44CC
- 提示2:5Lmf5bCx5piv5Y+N5bqU5YmN5ZCO5Y6f5a2Q55qE56eN57G75ZKM5Liq5pWw5LiN5Y+Y44CC
- 答案:Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.相关实验原理与化学反应方程式的书写都正确的是
A: 铁丝在氧气中燃烧:4Fe+3O22Fe2O3 |
B: 洗去试管壁上附着的铜:Cu+H2SO4===CuSO4+H2↑ |
C: 用氢氧化钠吸收二氧化硫:2NaOH+SO2===Na2SO4+H2O |
D: 工业制取二氧化碳:CaCO3CaO+CO2↑ |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo5q2k57G76aKY55uu5Lit77yM6aaW5YWI6KaB55yL5Y+N5bqU5piv5ZCm56ym5ZCI5LqL5a6e77yM5Lmf5bCx5piv5Y+N5bqU6IO95ZCm5Y+R55Sf44CB5Y+N5bqU55qE5Y+N5bqU54mp5LiO5Lqn54mp5piv5ZCm5q2j56Gu44CC
- 答案:RA==
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