The solutions taken in test tubes A) Milk in water , B) Baking soda in Water , C) Vinegar in Water and D) Glucose in Water . What colour is expected when a piece of red litmus paper is dropped in each test tube? Share with your friends Share 0 Subhajit Sahoo answered this No change, blue,red,red 0 View Full Answer Ayush answered this All of the above all make no change -5 Keshini answered this A no change, B red, C no change, D no change -1