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________________?
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 ?
Substance which is found in dried up lakes of Tibet and California is_______________?
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