2015辽宁省抚顺市中考化学真题及答案
2015辽宁省抚顺市中考化学真题及答案一、选择题1.下列物质属于纯净物的是( ) A.河水B.汽水C.蒸馏水D.矿泉水 【答案】C2.碘盐中通常含有少量的碘酸钾(化学式为KIO3),碘酸钾中碘元素的化合价为( ) A.﹣1B.+1C.﹣5D.+5【答案】D3.下列生活用品中,主要由合成材料制成的是( ) A.纯棉外套B.铝合金窗C.木制桌椅D.尼龙背包【答案】D4.下列实验中的做法错误的是( ) A.用红磷燃烧测定空气中氧气的含量时,用足量的红磷 B.做铁丝在氧气中燃烧实验前,在集气瓶内铺一层细沙 C.排水法收集气体,当导管口刚有气泡冒出时立即收集 D.蒸发操作中,当蒸发皿中出现较多量...
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