Test the nature of food in mouth by Litmus paper.

The slurry mass of food in the mouth is

Test the nature of lemon juice and milk sample with the help of natural indicators prepared from different flowers. Explain their nature.

Take about 1 gram of solid NaCl in a clean and dry test tube. Add some con. H_2SO_4 and test the evolved gas with a litmus paper. Your observation is

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. (a) What will be the action of gas on (i) dry litmus paper? (ii) moist litmus paper? (b) Write a balanced chemical equation for the reaction taking place.

Write a short note on digestion of food in mouth .

Why does dry HCl gas not change the colour of the dry litmus paper?

During the journey of food from mouth to stomach through esophagus . How does muscular system coordinate in this process ?

During the journey of food from mouth to stomach through oesophagus. How does muscular system coordinate in this process?

Write down the parts of the gut where the journey of food starts from mouth to anus.

How do you test the nature of the solution formed by dissolving CaO in water? what is the nature of the solution?