护理入学考试化学练习卷（附答案）

什么是放热反应？

1. A需要光才能开始的反应
2. B向周围环境释放热量的反应
3. C完全没有能量变化的反应
4. D从周围环境吸收热量的反应

Which property is typical of bases?

1. AThey feel slippery
2. BThey taste sour
3. CThey turn blue litmus red
4. DThey have a pH below 7

At sea level, at what temperature does pure water freeze?

1. A−32 °C (−26 °F)
2. B32 °C (90 °F)
3. C100 °C (212 °F)
4. D0 °C (32 °F)

Which coefficients balance __KClO₃ → __KCl + __O₂?

1. A1, 1, 3
2. B2, 1, 3
3. C2, 2, 3
4. D1, 1, 1

下列哪项是 NaCl 等离子化合物的典型性质？

1. A熔点低，在室温下是气体
2. B像金属一样柔软，易弯曲
3. C干燥的固体能导电
4. D熔点高；溶解后能导电

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. ATotal heat content
2. BVolume
3. CMass
4. DDensity

The true volume in a flask is 10.0 mL. A student measures it three times and gets 8.1 mL, 8.1 mL and 8.2 mL. How are these results best described?

1. ANeither accurate nor precise
2. BBoth accurate and precise
3. CPrecise but not accurate
4. DAccurate but not precise

A sealed rigid can holds gas at 2 atm and 27 °C. It is heated to 327 °C. What is the new pressure?

1. A2.4 atm
2. B4 atm
3. C1 atm
4. D24 atm