The H.D.I. report by the Planning Commission took what indicators to prepare it apart from the three standard indices ?

What is the natural indicator that is obtained from lichens ?

The paper clip below has the indicated length. What is the length in standard form.

In the study of titration of NaOH and Na_(2)CO_(3) . NaOH and NaHCO_(3) , Na_(2)CO_(3) and NaHCO_(3) , phenophthalein and methyl orange are used as indicators. (a). When phenolphthalein is used as an indicator for the above mixture: (i). It indicates complete neutralisation of NaOH or KOH (ii). It indicates half neutralisation of Na_(2)CO_(3) because NaHCO_(3) is formed at the end point. (b). When methyl orange is used as an indicator for the above mixture (i). It indicates complete neutralisation of NaOH or KOH (ii). It indicates half neutralisation of Na_(2)CO_(3) because NaCl is formed at the end point. Q. A 10 g moxture of NaHCO_(3) and KOH is dissolved in water to make 1000 mL solution. 100 " mL of " this solution required 50 " mL of " 0.2 M HCl for complete neutralisation in the presence of phenolphthalein as indicator What is the percentage of NaHCO_(3) in the mixture?

Write down the reactions involved in the preparation of the following using the reagents indicated in parenthesis: 'Acetoxime from acetaldehyde'. [K_(2)Cr_(2)O_(7)//H^(+), Ca(OH)_(2) , and NH_(2)OH.HCl]

The acid from of an acid base indicator is yellow in acid and red in basic from. What is the change in pH in order to change the indicator form 80% yellow to 80% red.

What fraction of an indicator H"in" is in the basic form at a pH of 6 if pK_(a) of the indicator is 5 ?