MPSC Rajyaseva 2013 GS Paper 1 — Question 84
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रिकामी जागा योग्य शब्दाने भरा. एका शासकीय नोकरास लाच घेताना पकडण्यास्तव तयार केलेल्या सापळ्यात फेनाँफथेलीन पावडर लावलेल्या नोटा वापरल्या गेल्या. गुन्ह्यासाठी पुरावा म्हणून त्यावर शिंपडलेले सोडियम कार्बोनेट __________ रंगाचे व्हावयास हवे. (1) निळे (2) जांभळे (3) लाल (4) काळे Fill in the blank appropriately. A trap laid for apprehending a Govt. employee taking bribe used phenophthelein powder coated currency notes. A solution of sodium carbonate sprinkled on the notes must turn __________ for lending proof for the crime. (1) blue (2) purple (3) red (4) black
Phenolphthalein is colorless in acidic/neutral medium and turns pink/purple in basic medium. Sodium carbonate is a basic salt, turning phenolphthalein purple/pink.
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