Question
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | ……… | No change | ……… | |
| 2. | ……… | ……… | Orange colour turns red | |
| 3. | Red litmus turns blue | ……… | ……… | |
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | ……… | No change | ……… | |
| 2. | ……… | ……… | Orange colour turns red | |
| 3. | Red litmus turns blue | ……… | ……… | |
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | ……… | No change | ……… | Acid |
| 2. | ……… | ……… | Orange colour turns red | Acid |
| 3. | Red litmus turns blue | ……… | ……… | Alkali |
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| Isotopes | Proton number | Neutron number |
| 11H | ||
| 21H | ||
| 3517Cl | ||
| 3517Cl | ||
| 3717Cl |




| Organ systems | Organs | Functions |
| 1. Respiratory system | ||
| 2. Circulatory system |