MCQ
Which of the following is not a buffer solution?
- A$CH _3 COOH + CH _3 COONa$
- B$NH _4 OH + NH _4 Cl$
- C$H _2 CO _3+ NaHCO _3$
- ✓$NaOH + NaCl$
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| List - I | List - II |
| A. Atomic solid | 1. Naphthalene |
| B. Molecular crystal | 2. KCl |
| C. Covalent crystal | 3. Frozen elements of group 18 |
| D. Ionic crystal | 4. Diamond |
The ratio of close packed atoms to tetrahedral hole in cubic packing is ____________.