Science, asked by aabuzear, 11 months ago

Which of the following substances is used as invisible ink ?

a) Ferrous sulphate b) Nickel chloride c) Cobalt chloride d) All of these

Answers

Answered by Sidyandex
1

All of these are used as invisible ink which provides better support and solution to the client to make use in a winning way.


It is known as security ink which has main substance user for writing and it is invisible either on the application or soon thereafter in a fine manner.

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