(b) Sulphuric acid is referred to as Oil of vitriol mainly because during the later middle ages, it was obtained as an oily viscous liquid by heating crystals of green vitriol.CBSE Class eleven subjects for the students who will go with Science and Commerce stream are presented down below. Each of the topics are Obligatory topics and the syllabus o
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लड़के पर जवानी आती देख जब्बार के बाप ने पड़ोस के गाँव में एक लड़की तजवीज़ कर ली। लेकिन जब्बार ने हस्बा की लड़की शब्बू को जो पानी भर कर ल�