Why Starch-Iodide paper gets blue when come in contact with starch?

When an acetylenic hydrocarbon, in presence of excess oxygen is exploded, it shows a contraction in volume by 50 mL. a further contraction of 75 mL is observed when the obtained gas mixture comes in contact with KOH solution. Determine the molecular formula of the compound.

Why do internodal segments of sugarcane fail to propagate vegetatively even when they are in contact with damp soil ?

Tea gets cooled when sugar is added to it. Why?

If the hand or any portion of the body comes in contact with white phosphous, it should be washed with copper sulphate solution - why ?

Cross-like configurations when non-sister chromatids of a bivalent come in contact during first meiotic division are

The leaft tentacles of sundew plant bents and hold when it get contact to a insect(protein). Is is an example of-

When concentrated sulphuric acid is added to an inorganic mixture containing chloride ,we get colourless pungent smelling gas HCI, but if the mixture contains bromide then we get red vapour of bromine .Why?

What colour change does a blue or red litmus paper exhibit when it is put separately in each of the following aqueous solutions ? NH_(4)Cl .

What colour change does a blue or red litmus paper exhibit when it is put separately in each of the following aqueous solutions ? CH_(3)COONa .

What colour change does a blue or red litmus paper exhibit when it is put separately in each of the following aqueous solutions ? CH_(3)COONH_(4) .