A woman desires to clean the surface of her gold ornaments by a chemical approach. For this she requires to use

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Q: 91 (CDS-II/2010)
A woman desires to clean the surface’ of her gold ornaments by a chemical approach. For this she requires to use
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question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,21,13,21,8,2,3

keywords: 

{'gold ornaments': [0, 0, 1, 0], 'sodium thiosulphate solution': [0, 0, 1, 0], 'aqua regia': [0, 0, 1, 0], 'chemical approach': [0, 0, 1, 0], 'concentrated naoh': [0, 0, 1, 0], 'concentrated h2s04': [0, 0, 0, 1], 'surface': [1, 0, 0, 0]}