Cobalt chloride paper is ______ in colour when moist.

Q. If a dried cobalt chloride paper is clipped on the under surface of a leaf its colour changes from blue to pink because

Q. Cobalt chloride paper is _________ colour when moist.

Q. When a solution of sodium hydroxide is added to a solution of cobalt chloride, insoluble purple cobalt hydroxide and soluble sodium chloride are formed. Of the following methods, the cobalt hydroxide could best be separated from the sodium chloride by:

Q. Assertion :Water is tested by using blue cobalt chloride paper. Reason: Water turns blue cobalt chloride pink