Paper chromatography of black inkकाली स्याही का पेपर वर्णलेखन

NCERT Fig 5.15 · interactive diagram

Parts and their functions

• Gas jar with cover (ढक्कन वाला गैस जार) — A closed jar keeps the air inside saturated with solvent vapour so the paper does not dry out.
• Chromatography (or filter) paper strip (वर्णलेखन (या फ़िल्टर) पेपर पट्टी) — Water rises up the paper and carries the dyes with it.
• Pencil line, 2 cm from bottom (पेंसिल रेखा, नीचे से 2 cm) — Drawn in pencil because graphite does not dissolve and move.
• Ink spot (स्याही का धब्बा) — Must stay ABOVE the water level, otherwise the ink would dissolve into the water instead of climbing.
• Solvent (water) (विलायक (जल)) — Moves up the paper by capillary action.
• Separated colours (अलग हुए रंग) — Each dye moves at its own speed (different attraction for water and paper), so they separate — black ink is a mixture.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 5.15. Report a mistake