Chemistry
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Conc. HCl and conc. HNO3
Conc. HNO3 and conc. HCl
Dil. HCl and dil. HNO3
Conc. HNO3 and conc. H2SO4

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Chemistry
Atoms of different elements have

Different atomic number and same eletronic configu-ration
Same atomic number and same electronic configuration
Same number of electrons and neutrons
Different atomic number and different number of valence electrons

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Chemistry
Which of the process is known as nitrification?

Conversion of ammonia to nitrites
Conversion of nitrite to nitric oxide
Reaction of Nitrogen Monoxide with oxygen to form nitric acid
Reaction of nitrogen dioxide with water to form nitric acid

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