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The hardness of a water sample is measured directly by titration with 0.01 M solution of ethylenediamine tetraacetic acid (EDTA) using eriochrome black T (EBT) as an indicator. The EBT reacts and forms complexes with divalent metallic cations present in the water. During titration, the EDTA replaces the EBT in the complex. When the replacement of EBT is complete at the end point of the titration, the colour of the solution changes from
EDTA titration method of hardness determination of water sample uses an indicator which combines with hardness causing divalent cations and forms a coloured complex. The name of the indicator and the colour of the formed complex respectively are
In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shows the changes of pH of the titration mixture in this experiment? (1)  (2)  (3)  (4) 
The end point of the titration in the soap titration method is ___________
Consider the following statements: (a) Both acids and bases change the colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct?
Which of these is the used as the indicator when the titration is carried out to determine the amount of COD present in a sample.
The indicator used in the titration of a strong acid and a strong basis
In a titration involving weak acid and strong base, the preferred indicator is
মৃদু অম্ল ও মৃদু ক্ষারকের টাইট্রেশনে উপযুক্ত নির্দেশক কী? (What is the suitable indicator for the titration of weak acid with weak base?) 
Which one is incorrect match:-   TITRATION INDICATOR 1) Strong acid v/s strong base Phenolphthalein & methyl Orange 2) Weak acid v/s strong base Phenolphthalein 3) Strong acid v/s weak base Methyl orange 4) Weak acid v/s weak base Methyl Red