Download App

General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements2 Marks
Question
What is meant by the term "chromatography"?
✓

Answer

It is the technique of separating the components of a mixture in which separation is achieved by the differential movement of individual components through a stationary phase under the influence of a mobile phase. The stationary is made of aluminum oxide or silica gel.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from General Principles and Processes of Isolation of Elements→General Principles and Processes of Isolation of Elements — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Give the structures of A, B and C in the following reaction:$\text{C}_6\text{H}_5\text{NO}_2\xrightarrow[]{\text{Fe}/\text{HCl}}\text{A}\xrightarrow[273\text{K}]{\text{NaNO}_2+\text{HCl}}\text{B}\xrightarrow[\Delta]{\text{H}_2\text{O}/\text{H}^+}\text{C}$
→
Explain the preparation of aldehydes and ketones by hydration of alkynes with suitable example.
→
Write the structure of the monomers of the following polymer:
  1. PVC.
  2. Polypropene.
→
  1. Why are aquatic species more comfortable in cold water than in warm water?
  2. What happens when we place the blood cell in saline water solution (hypertonic solution)? Give reason.
→
Write the coordination number of each ion in the following crystals:
  1. NaCl
  2. CsCl
→
(i) Write a reaction to prepare carboxylic acid from carboxylation of alkene.
(i) Explain Arndt Eistert reaction.
→
Accomplish the following conversion:
Aniline to p-bromoaniline.
→
Niobium crystallises in body-centred cubic structure. If density is $8.55\ g\ cm^{–3},$ calculate atomic radius of niobium using its atomic mass 93 u.
→
Write the reagents used in the following reactions:
  1. $\text{C}_{6}\text{H}_{5}-\text{CO}-\text{CH}_{3}\xrightarrow{\text{ }\ \ \ \ \ \ {?}\ \\ \ \ \ \ \ }\text{C}_{6}\text{H}_{5}-\text{CH}_{2}-\text{CH}_{3}$
  2. $\text{CH}_{3}-\text{COOH}\xrightarrow{\text{ }\ \ \ \ \ \ {?}\ \\ \ \ \ \ \ }\text{CH}_{3}-\text{COCl}$
→
Which forces are involved in holding the drugs to the active site of enzymes?
→