The negative ions having group of atoms is/are:
Correct answer: D. All of these
- A. OH-
- B. CO32-
- C. Cr2O72-
- D. All of these
Explanation
The negative ions having a group of atoms are called polyatomic ions. Examples of polyatomic ions include carbonate (CO3-2), sulfate (SO4-2), nitrate (NO3-), hydroxide (OH-), and dichromate(Cr2O7)2−. All the options are correct.
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About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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