Boron in soil has been considered micronutrient for_________________?
A. Soil porocity B. Proper growth of plants C. Alkalinity of soil D. All
Chemistry MCQs
Substance which is found in dried up lakes of Tibet and California is_______________?
A. Tincal B. Boric acid C. Calcium carbonate D. Colemanite
Which of the following does not give Borax bead test ?
A. Cu B. Cr C. Ni D. A1
The metal which is used in thermite process because of its activity is____________________?
A. iron B. copper C. aluminium D. zinc
Which of the following shows inert pair effect ?
A. boron B. carbon C. silicon D. tin
Tincal is a mineral of___________________?
A. A1 B. Si C. B D. C
Which one of the following is not a semiconductor ?
A. Si B. Ge C. Se D. Sn
The process of aluminium extraction is called__________________?
A. Hall process B. Thermite process C. Haber process D. Contact process
Aqueous solution of borax above 62°C gives crystals of________________?
A. Na2B4O7.4H2O B. Na2B4O7.5H2O C. Na2B4O7.2H2O D. Na2B4O7.10H2O
Which of the following is not a use of silicon ?
A. Lubricants B. Hydraulic brakes C. Antifreeze D. Water repellent