हमसे संपर्क करें एनसीईआरटी, श्री अरबिंदो मार्ग, नई दिल्ली-110016 dceta [dot]ncert [at]nic [dot]in +91 8800440559 महत्वपूर्ण हेल्पलाइन नंबर महिला हेल्पलाइन नंबर : 7827170170 NCERT Book Class 12 Chemistry-I Chapter 07: The p-block elements in Hindi and English Medium in PDF form download here. NCERT sets the academic syllabus for the Class 12 board exams, and their books are prescribed to CBSE students. 2. In qualitative analysis when H2S is passed through an aqueous solution of salt acidified with dil. HCl, a black precipitate is obtained. On boiling the precipitate with dil. HNO 3, it forms a solution of blue colour. Addition of excess of aqueous solution of ammonia to this solution gives _________. Subject- Chemistry chapter- The p-Block Elements (XII) Read full ncert pdf online with notes & video guides
