Extraction : Mercury is extracted from cinnabar ore by carbon reduction process. This process consists of the following steps. Concentration of cinnabar ore by froth flotation process: Cinnabar is a sulphide ore and hence it is concentrated by froth flotation process. Roasting of the concentrates ore: The concentrated ore is roasted in air when it … Read moreHow mercury is extracted in pure form from its sulphide ore?
Class: 12 || Subject: Computer Science || Unit-3: Communication and Networking Short Answer Questions Describe the Bus and Star topology with suitable diagram. [2.5+2.5=5] Differentiate between guided and unguided networking media.  Who is system analyst? Explain the roles of system analyst. [1+4=5] Explain Bus and Star topology with advantages and disadvantages. [2.5+2.5=5] Describe ‘simplex’, … Read moreHSEB || Important Model Questions of Computer Science Class 12
Unit 1 System Development Concept Class: 12 | Subject: Computer Science Short Answer Questions. What are the major activities in SDLC with based on waterfall model?  Write the importance and necessity of SDLC.  Describe the components of feasibility study.  Who is system analyst? List out characteristics of system analyst. [1+4] Describe system flowchart with diagram. … Read moreImportant latest questions of Computer Science Class 12
Model Question 2067 Subject: Computer Science | F.M.: 75 |P.M.: 27 | Time: 3 hrs Candidates are required to give their own words as practicable. The figures in the margin indicate full marks. Group A Long Answer Questions Attempt any Four Questions. What is Entry-Relationship Data Model? Give an ER-diagram for a database showing fatherhood, … Read moreOld model question for Computer Science Class 12 (XII) 2067 (2010)