Consider the following statements: Glass can be etched or scratched by I. diamond. II. hydrofluoric acid. III. aquilegia. IV. cone, sulphuric acid. Which of these statements are correct?

Asked in UPPCS Prelims 1999 · Topic: Physical and Chemical Changes, Solution (Definition and Characteristics of Chemical Changes (Chemical Reactions))

1. I and IV
2. II and III
3. I and II
4. II and IV

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