Dyes in black ink can be separated by :<\/p>\n
[amp_mcq option1=”evaporation.” option2=”centrifugation.” option3=”sublimation.” option4=”chromatography.” correct=”option4″]<\/p>\n
Let’s consider the other options: Dyes in black ink can be separated by : [amp_mcq option1=”evaporation.” option2=”centrifugation.” option3=”sublimation.” option4=”chromatography.” correct=”option4″] This question was previously asked in UPSC CISF-AC-EXE – 2022 Download PDFAttempt Online Black ink is typically a mixture of several coloured dyes. To separate the different components (dyes) of a mixture, various separation techniques can be used. The technique … <\/p>\n
\nA) Evaporation separates a soluble solid from a liquid solvent by heating the solution to evaporate the solvent. This would only leave the mixture of dyes behind, not separate them.
\nB) Centrifugation separates components of a mixture based on their density by spinning at high speed. It is used for separating solids from liquids or liquids of different densities (e.g., separating cream from milk, separating blood cells from plasma). It is not suitable for separating dissolved dyes.
\nC) Sublimation is the process where a substance changes directly from a solid to a gas state upon heating (e.g., dry ice, iodine). It is used to separate sublimable solids from non-sublimable ones. Dyes in ink are not typically sublimable.
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\n– Chromatography is a separation technique used to separate components of a mixture based on their different affinities for a stationary phase and a mobile phase.
\n– Paper chromatography is specifically effective for separating different dyes in ink.
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