A PINCH OF SNUFF

In a certain code language, "TUBE" is written as "202125" and "PINCH" is written as "1691438". How is "MARC" written in that code language?

Mix calcium sulphate with conc. HCl and forms a paste. Bring a pinch of this paste near to the flame, what colour will you obtain?

To an acidified dichromate solution, a pinch of Na_(2)O_(2) is added and shaken. What is observed ?

A student placed a pinch of solid sodium hydrogencarbonate on a strip of red litmus paper. He found that the colour of red litmus paper strip:

A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium carbonate to it. What will he observe ?

In an experiment on O_(2) evolution by photosynthesising Hydrilla plant, a pinch of sodium bicarbonate is added to water. The rate of photosynthesis or O_(2) evolution will