Two identical metal sheets, A and B are rubbed with paper and sand paper respectively. Which one of them will shine more? एक जैसी दो धात्विक पट्टिकाओं A तथा B को क्रमशः कागज तथा रेगमाल से रगड़ा जाता है। इनमें से कौनसी पट्टिका अधिक चमकेगी?
The correct statement with regard to H+2 & H−2 is
Assertion : For drying H2S, Conc. H2SO4 cannot be used.
Reason: Moist H2S is oxidized by Conc.H2SO4