Question

E. Answer the following questions. 1. Why do solids have a fixed shape and a definite volume?
2. Briefly describe an activity to show that pure water is a transparent liquid.
3. Describe an activity to show that a solid can diffuse slowly into a liquid.
4. What is a 'saturated solution'? How can one prepare a saturated solution of common salt in water?
5. Suggest one activity to show the effect of temperature on the solubility of a solid in water. ​

Answer 1

Answer:

Feeling sad can alter levels of stress-related opioids in the brain and increase levels of inflammatory proteins in the blood that are linked to increased risk of comorbid diseases including heart disease, stroke and metabolic syndrome, according to a study.

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