2018年湖北省襄阳市中考理综(化学部分)试题(word版,含答案)
7、生活中的下列变化,属于化学变化的是A.玉米榨汁B.葡萄酿酒C.蔗糖溶解D.汽油挥发8、下列关于催化剂的说法正确的是A.化学反应前后催化剂的质量不变B.化学反应前后催化剂的性质不变C.催化剂只能加快化学反应速率D.没有催化剂化学反应不能发生9、将密封良好的方便面从襄阳带到西藏时,包装袋鼓起,是因为袋内气体的A.分子个数增多B.分子质量增大C.分子间隔增大D.分子体积变大10、一种新型材料C3N4的硬度比金刚石还大,可做切割工具。在C3N4中,C为+4价,则N元素的化合价是A.+3B.+1C.-1D.-311、襄阳市正在创建国家级文明城市。下列做法错误的是A.加大空气监测力度,改善环境状况B....
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