Which of the following way in used for classification of chromatography ?
Which of the following way in used for classification of chromatography ?
		A. Shape
B. Phase
C. Mechanism
D. All
		A. Shape
B. Phase
C. Mechanism
D. All
		A. O
B. 1
C. 2
D. 3
A. 3.6 x 10-6
B. 3.6 x 10-5
C. 7.2 x 10-6
D. 4 x 10-4
		A. NaCl
B. H2O
C. CCI4
D. It can be applied to all mentioned above
		A. 1
B. 2
C. 3
D. 4
 
The valency of carbon is 4. As the atomic number of carbon is 6, it has a total of 6 electrons in one atom arranged in the following configuration. it needs to add 4 more electrons to the 2p sub-shell, or lose 4 electrons from the 2s and 2p sub-shells.
		A. Ca and P
B. S and P
C. Ca and S
D. we could not apply
A. oxides
B. silicates
C. slag 
D. carbonates