|
|
| (4 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| − | ==2024==
| |
| − | <math>8</math>. Which substance may be treated with bleach (sodium hypochlorite) to render it less hazardous?
| |
| | | | |
| − | <math>\textbf{(A)}~ </math> Sodium Cyanide<math>\qquad\textbf{(B)}~</math> Ammonia<math>\qquad\textbf{(C)}~</math> Hydrochloric acid <math>\qquad\textbf{(D)}~</math> Ozone
| |
| − |
| |
| − |
| |
| − |
| |
| − | <math>9</math>. Which indicator would be most suitable for a titration to determine the concentration of ammonia in a window
| |
| − | cleaning solution using aqueous HCl?
| |
| − |
| |
| − | <math>\textbf{(A)}~ </math> Eriochrome Black T<math>\qquad\textbf{(B)}~</math> Ferroin<math>\qquad\textbf{(C)}~</math> Methyl orange <math>\qquad\textbf{(D)}~</math> Phenolphthalein
| |
| − |
| |
| − | 11. Ethane, C2H6, and diborane, B2H6, do not adopt analogous molecular structures. Which experimental technique would be least useful in establishing this fact?
| |
| − | (A) Infrared spectroscopy
| |
| − | (B) Mass spectrometry
| |
| − | (C) Nuclear magnetic resonance spectroscopy
| |
| − | (D) X-ray crystallography
| |
