江苏省淮安市2018年中考化学真题试题(含答案)
江苏省淮安市2018年中考化学真题试题一、选择题(本题共10小题,每小题2分,共20分.每小题只有一个选项符合题意)1.下列属于化学变化的是( )A.瓷碗破碎B.粮食酿酒C.甘蔗榨汁D.白醋挥发2.下列食物中富含蛋白质的是( )A.牛奶B.黄瓜C.大米D.豆油3.下列操作正确的是( )4.氢氟酸(HF)可用于在玻璃上雕刻各种精美图案,发生反应的化学方程式可表示为SiO2+4HF=X↑+2H2O,则物质X为( )A.SiOB.O2C.SiF4D.SiF5.下列物质中,计入“空气污染指数”的是( )A.氧气B.氮气C.二氧化碳D.可吸入颗粒物6.下列符号中,能表示2个氢离子的是( )A...
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