31 August 2013

Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 8

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 8

Chemistry Online Mcqs Test for class 12, Second Year, According to Karachi Board 300 Online Multiple Choice Questions
Q1. The elements which belong to group IIIA to group VIIIA are called
Q2. All elements of group IIIA show high covalency due to
Q3. The formula of borax is
Q4. The formula of orthoboric acid is
Q5. Which elements exhibit allotropy?
Q6. Bauxite, Cryoiite and Alunite are ores of
Q7. Bayer’s process is used for the purification of
Q8. When aluminum is added to potassium hydroxide solution
Q9. In the Hall - Beroult process for producing aluminum the substance produced at the cathode is
Q10. Na3AIF6 is called
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