Which of the following statements is not true about partition chromatography ?
An organic compound A upon reacting with NH3 gives B. On heating B gives C. C in presence of KOH reacts with Br2 to give CH3CH2NH2. A is
How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?
A train is moving on a straight track with speed 20ms−1. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound =320ms−1) close to :
Consider the following reaction:
The values of x, y and z in the reaction are, respectively: