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原子量:Hl一1 ()～16 Zn一65 S一32 C 12 一、选择题 (13%)每题只有一个答案 1.下列变化不属于化学变化的是( ). (A)白磷在空气中自燃 (B)由液态空气制得氧气 (C)蓝色的硫酸铜晶体受热变白 (D)硫酸氢铵受热后消失 2.下列物质中既含有游离态氧元素,又含有化合态氧元素的物质是(
Atomic weight: Hl - 1 () ~ 16 Zn - 65 S - 32 C 12 1. Multiple-choice questions (13%) There is only one answer per question 1. The following changes are not chemical changes (). (A) White phosphorus in the air Spontaneous combustion (B) Oxygen gas produced from liquid air (C) Blue copper sulfate crystals heated to white (D) Disappears after heating of ammonium bisulfurate 2. Substances containing both free oxygen and chemical oxygen in the following substances Yes(