State the colour change in three different indicators in presence of HCl gas.

State the colour change in a neutral litmus in presence of (i) acidic (ii) alkaline medium

Only water can exist in three different states

State the colour change in a universal indicator e.g. pH paper on (i) slightly acidic soil (ii) slightly alkaline soil (iii) dairy milk (iv) human blood tested for medical diagonsis

The variation of pH during the titration of 0.5 N Na_2CO_3 with 0.5 N HCl is shown in the given graph.The following table indicates the colour and pH ranges of different indicators : {:("Indicator","Range of colour change","Colour in acid","Colour in base"),("Thymol blue",1.2 "to" 2.8,"Red","Yellow"),("Bromocresol red",4.2 "to" 6.3,"Red","Yellow"),("Bromothymol blue",6.0"to"7.6,"Yellow","Blue"),("Cresolphethalein",8.2 "to" 9.8,"Colourless","Red"):} Based on the graph and the table which of the following statements are true ?

Mention the colour changes observed when the following indicators are added to acids: Methyl orange solution

Mention the colour changes observed when the following indicators are added to acids : Neutral litmus solution.

Mention the colour changes observed when the following indicators are added to acids : Alkaline phenolphthalein solution

Mention the colour changes observed when the following indicators are added to acids : Methyl orange solution

A large difference between the fourth and fifth ionization energies indicates the presence of: