PAPER SOLUTION

JEE Advanced 2018 | Paper - 1 | Complete Solution

JEE Advanced 2018 | Paper - 2 | Complete Solution

In a experiment to measure the pH values of solutions, a student placed strips of universal indicator paper in foru beakes containig solutions A,B, C and D. The colour of universal indicator paper in these solutions is a shown below: The solution having lowes pH value is:

When the strip of pH paper was put in a given solution the pH paper changes to orange red. The given solution is most likely to be of:

(a) Write your observation, if you dip a red litmus paper in soap solution. (b) Suggest one method to remove the temporary hardness of water.

Assertion (A) An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles. Reason (R) Pore size of the filter paper becomes more than the size of colloidal particle.

A blue litmus paper was first dipped in dil. HCl and then in dil. NaOH solution. It was observed that the color of litmus paper