Chromatography and Rf Value
JEE Main Chemistry · Purification and Characterisation of Organic Compounds · 15 questions, latest first
- R_f value for 2-methylpropene in a solvent system (Ethyl acetate + ether) is 0.42. 2-methylpropene is treated with dilute H_2…20266 April, Shift 1 · Q63
- Given below are two statements: Statement (I): In partition chromatography, stationary phase is thin film of liquid present in…202529 January, Shift 2 · Q64
- In the given TLC, the distance of spot A & B are 5 cm & 7 cm, from the bottom of TLC plate, respectively. R_f value of B is x ×…20249 April, Shift 2 · Q88
- The correct statement among the following, for a "chromatography" purification method is:20246 April, Shift 2 · Q73
- Using the given figure, the ratio of R_f values of sample A and sample C is x × 10^-2. Value of x is ____.20245 April, Shift 2 · Q88
- The adsorbent used in adsorption chromatography is/are - A. silica gel B. alumina C. quick lime D. magnesia Choose the most…20244 April, Shift 2 · Q73
- 'Adsorption' principle is used for which of the following purification method?202431 January, Shift 1 · Q71
- On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation…202430 January, Shift 1 · Q89
- Chromatographic technique/s based on the principle of differential adsorption is / are A. Column chromatography B. Thin layer…202429 January, Shift 2 · Q68
- Which of the following statement is correct for paper chromatography?202315 April, Shift 1 · Q80
- Three organic compounds A, B and C were allowed to run in thin layer chromatography using hexane and gave the following result…202312 April, Shift 1 · Q87
- Thin layer chromatography of a mixture shows the following observation: The correct order of elution in the silica gel column…202311 April, Shift 1 · Q72
- Using column chromatography, mixture of two compounds 'A' and 'B' was separated. 'A' eluted first, this indicates 'B' has202310 April, Shift 1 · Q71
- From the figure of column chromatography given below, identify incorrect statements. A. Compound ' c ' is more polar than ' a '…20236 April, Shift 2 · Q76
- Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound…202329 January, Shift 1 · Q59