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Aluminum oxide is_________________?
A. Acidic oxide B. Basic oxide C. Amphoteric oxide D. It does not exists Submitted by :- Jamil Ahmed
Aqueous solution of borax above 62°C gives crystals of________________?
A. Na2B4O7.4H2O B. Na2B4O7.5H2O C. Na2B4O7.2H2O D. Na2B4O7.1H2O Submitted by :- Jamil Ahmed
The process of aluminum extraction is called__________________?
A. Hall process B. Thermite process C. Haber process D. Contact process Submitted by :- Jamil Ahmed
Tincal is a mineral of___________________?
A. Al B. Si C. B D. C Submitted by :- Jamil Ahmed
The metal which is used in thermite process because of its activity is____________________?
A. iron B. copper C. aluminum D. zinc Submitted by :- Jamil Ahmed
Which of the following does not give Borax bead test ?
A. Cu B. Cr C. Ni D. Al Submitted by :- Jamil Ahmed
Substance which is found in dried up lakes of Tibet and California is_______________?
A. Tincal B. Boric acid C. Calcium carbonate D. Colemanite Submitted by :- Jamil Ahmed
Boron in soil has been considered micronutrient for_________________?
A. Soil porosity B. Proper growth of plants C. Alkalinity of soil D. All Submitted by :- Jamil Ahmed
Phosphorus is a Greek word and it means_________________?
A. Light bearing B. Fire C. Impure D. Tetrahedral Submitted by :- Jamil Ahmed
Which of the following will give phosphoric acid one reaction with water_________________?
A. PCI5 B. P2O3 C. P2O5 D. All of the above Submitted by :- Jamil Ahmed