This acid is Olium, H2S2O7, this is one of the hazardous acids," Yadav said. This incident also led to the evacuation of people from surrounding villages as a precaution.

CBSE Sample paper for Class 12th Chemistry Chemistry (Theory) Time Allowed: 3 hours Maximum Marks: 70 General Instructions: (i) All questions are compulsory. (ii) Questions number 1 to 5 are very ...

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