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Consider the sulphides HgS, PbS, CuS, Sb2S3 , As2S3 and CdS. Number of these sulphides

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Consider the sulphides HgS, PbS, CuS, Sb2S3 , As2S3 and CdS. Number of these sulphides soluble in 50% HNO3 is ......

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1 Answer

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Pbs, CuS, As2S3 , CdS are soluble in 50% HNO3 HgS, Sb2S3 are insoluble in 50% HNO3 

So Answer is 4.

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