Two solutions M and N give Red and blue colour respectively with a universal indicator.
(i)In which solution will the hydrogen ion concentration be more?Justify your answer.
(ii)If both M and N solution are mixed and the resultant mixture is tested with a universal indicator,it turns green.What is the nature of the salt formed?Justify your answer

Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?

A student took solution X in a test -tube and added a few drops of universal indicator to it. The solution turned blue. On addind another solution Y to this test tube drop wise, the colour of solution changed to green. When a yet another solution Z was added the solution turned yellow. Which of the following gives the correct conclusion of the student?

A mixture of ideal gases is cooled up to liquid helium temperature (4.22 K) to form an ideal solution. Is this statement true or false? Justify your answer in not more than two lines.

Solutions of two electrolytes A and B are diluted. The Lambda_(m) of 'B' increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer.

(a) Define a universel indicator. Mention its one use. (b) Solution A gives pink colour when a deop of phenolphthalein indicator is added to it. Solution B gives a red colour when a drop of methyl orange is added to it. What type or solution are A and B and which of these will have higher pH value ? (c) Name one salt whose solution has pH less then 7 and one salt with pH more than 7.

Acid-base indicator such as methy 1 orange, phenolphthalein, and bromothymol blue ate substances which change colour accroding to the hydrogen ion concentration of the solution to which they are added. Most indicators are weak acids (or more rarely weak base) in which the undissociated and dissociated forms have different and distinct colours. If methy 1 orange is used as the examples and the un-dissociated forms is written as HMO , then dissociation occurs as shown below: Reaction: {:(HMOhArr,H^(o+)+,MO^(Theta),,),(Red,"Colourless","Yellow",,):} The indicator should have a sharp colour change with the equivalence point of the titration. Usually the colour change of the indicator occurs over a range of about two pH units. It should be noted that the eye cannot detect the exact end point of the tiytration. The pK_(a) of the indicator should be near the pH of the solution at the equivalance point. Given that the K_(a) (methy 1 orange) = 4.0 xx 10^(-4) , a solution at pH = 2 containing the indicator would be

Acid-base indicator such as methy 1 orange, phenolphthalein, and bromothymol blue ate substances which change colour accroding to the hydrogen ion concentration of the solution to which they are added. Most indicators are weak acids (or more rarely weak base) in which the undissociated and dissociated forms have different and distinct colours. If methy 1 orange is used as the examples and the un-dissociated forms is written as HMO , then dissociation occurs as shown below: Reaction: {:(HMOhArr,H^(o+)+,MO^(Theta),,),(Red,"Colourless","Yellow",,):} The indicator should have a sharp colour change with the equivalence point of the titration. Usually the colour change of the indicator occurs over a range of about two pH units. It should be noted that the eye cannot detect the exact end point of the tiytration. The pK_(a) of the indicator should be near the pH of the solution at the equivalance point. Which of the following sitution exists at the equivalence point of titration?