Chemistry
The acid which can be used to etch designs on brassware is :
- HCl
- HNO3
- H2SO4
- H2CO3
Nitric Acid
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Answer
HNO3
Reason — Nitric acid (HNO3) is used to etch designs on brassware because it acts as solvent for a large number of metals except noble metals.
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Sulphur reacts with conc. HNO3 to give :
- SO2
- H2
- H2SO4
- H2S
The solvent for NO is :
- Freshly prepared FeSO4
- Fe2(SO4)3
- FeCl3
- FeCl2
HNO3 is kept in reagent bottles because it is :
- an oxidising agent
- a reducing agent
- hygroscopic in nature
- decompose in the presence of light
The nitrate which does not leave any residue behind on heating is :
- NaNO3
- NH4NO3
- AgNO3
- Ca(NO3)2