Q50. Which of the following gives a positive test with ninhydrin?\\
(1) Starch\\
(2) Egg albumin\\
(3) Polyvinyl chloride\\
(4) Cellulose
Q51.9.3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product ' P '. The mass of product ' P ' obtaind is 26.4 g . The percentage yield is $\_\_\_\_$ $\%$.