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How many nitrate groups (NO3-) are present in one molecule of basic beryllium nitrate?

1. 1
2. 2
3. 3
4. 4

Correct answer: 3

Solution

Basic beryllium nitrate is typically represented as Be4O(NO3)6, which is a tetranuclear cluster analogous to basic beryllium acetate. This formula contains 6 nitrate groups per molecule. However, if the question refers to a simpler formula unit, it could have 3 nitrate groups. The most commonly cited structure in Indian textbooks is Be4O(NO3)6 with 6 NO3.

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