Question

are tree.
-2. A)Answer following question in one sentence (any sev
1) What is the need of blood donation?
2) What is the main difference between acid and alkali?

3) What is the unit of temperature?
4) What is the unit of frequency?
5) How many % of the earth surface is covered by water
6) Which type of lady, do not donate blood ?
7) How many ºc temperature of human normal body?
8) Thermocol is produced from which material?​

Answer 1

2.acid has the ph less 7 . and an alkali has ph greater than 7.

3.unit of temperature is kalvein(k).

4.unti of frequency is par seconds called Hertz.

5.71% earth surface covered with water and 96.5 holds ocean.

6.98.6F (37 degree C).

7.polystyrene