#What is plastic deformation
#What is ductile material
#What is brittle matarial
What is mercury what is clinical thermometer
What is electrovalent compound?
What is covalent compound?
What is coordinate bond?
What is immunity?
What is vaccination?
What is antibodies?
1)What is volume ?
2) What is magnitude?
3) What is density?
4) What is diffusion?
5)What is osmosis?