Question

Which of the following are physical characteristics of blood? 1. it is more viscous than water 2. its temperature is about 38ºC (100.4ºF) 3. the pH is slightly alkaline 4. it is about 8% of one’s total body weight 5. its color is always a bright red

Answer 1

Explanation:

A property which does not bring any change in chemical composition of a substance is known as physical property.

For example, blood is more viscous than water, its pH is slightly alkaline, its temperature is about $38^{o}C$ ($100.4^{o}F$)  .

On the other hand, a property which changes chemical composition of a substance is known as a chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

Sometimes, the change in color of a substance can also occur due to a chemical change.

Thus, we can conclude that following are the physical characteristics of blood.

• it is more viscous than water.

• its temperature is about $38^{o}C$ ($100.4^{o}F$).

• the pH is slightly alkaline.

• it is about 8% of one’s total body weight.