NaOH is named as caustic soda because________________?
Correct answer: A. It corrodes the organic tissues
- A. It corrodes the organic tissues
- B. It is used in soda water
- C. It reacts with chlorine gas
- D. It reacts with fats to form soap
Explanation
Sodium hydroxide is called caustic soda because it is strongly corrosive and can chemically burn organic tissues. Its caustic action results from the high concentration of OH− ions in solution. Students may choose its reaction with fats because NaOH is used to make soap, but that use does not explain the word caustic.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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