111. B as govind mentioned generally cis diol is used (source : JD Lee pg 396)..iit has asked a similar q in 2006 and so has fiitjee in full test 7.
Q1)
Which of the following complexing agents is used for the exact determination of end point of the titration between boric acid and NaOH?
(A) EDTA (B) catechol (C) ethylene diamine (D) terpyridine
Q2)
How many moles of N2 will be released in blood when a diver from a pressure of 50 bar is brought to the sea level suddenly, where the pressure is 1 bar. Henry’s Law constant for solubility of N2 in blood as well as in water is 9.04 x 104 bar at 298 K. Density of blood = 1.00 Kg/L, volume of blood in healthy human body = 5.00 L, composition of air = 80 % N2
(A) 0.123 mols (B) 0.205 mols (C) 0.350 mols (D) 0.430 mols
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4 Answers
1sorry uttara,dont have the answers right now,they are with a friend.will try to get them by 2moro.
29Ans 1 ...B
Generally Cis-diols are used to detect the end point in case of strong alkali and boric acid..coz it forms a complex with B(OH)4- anion
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