In old age, people often suffer from stiff and inflamed joints. What is this condition called? What are the possible reasons for these symptoms?

The E°(M^2+/M) value for copper is positive (+0.34 V). What is the possible reason for this ?

Describe how coal is formed from dead vegetation . What is this process called?

What are the conditions to get accurate value of Molar mass from Colligative Properties?

A sample of urine was diagnosed to contain high content of glucose and ketone bodies. Based on this observation, answer the following: What is the condition called and how can it be rectified?

Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?