Question of The Day07-02-2020

Which of the following chemical compounds is not correctly matched with its common name?

Chemical compound                       

Common name

a)    CuSO4.5H2O                              

Nila thotha

b)    ZnNO3                                        

Lunar Caustic

c)    ZnSO4.7H2O                               

White vitriol

d)    HgS                                            



Correct Answer : b ) b

Explanation :

Nila thotha is common name of CuSO4.5H2O. It is also known as hydrated copper sulphate or blue vitriol. It is a chemical compound that is poisonous and highly soluble in water. Copper sulphate can be used in the form of a fungicide in agriculture. It is also used to remove infections of aquarium fishes that are caused by parasites.

White vitriol is common name of ZnSO4.7H2O. It is a colourless compound and is used in dyes and calico printing. It is also used in the form of an electrolyte during zinc plating. 

Sindoor is the common name of HgS. It is also known as mercuric sulphide or vermillion and is used for medicinal and colouring purposes.

Lunar Caustic is common name of silver nitrate (AgNO3). It is a white coloured compound that gets decayed in sunlight. It is used as a dye during elections as a mark of voting done by a person.

Hence, option (b) is correct.

Such type of question is asked in exams like UPPCS, SSC CGL, SSC CHSL, RRB NTPC and other government exams.

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