A. Beryllium
B. Carbon
C. Silicon
D. Aluminium
Which element can form tripositive ion ? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. As antiseptic in medicine
B. For washing eyes
C. In soda bottles
D. For enamel and glazes
Boric acid cannot be used__________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. it combines with H2O to form carbonic acid
B. it reacts with red blood cells of haemoglobin
C. it is powerful oxidizing agent
D. it is used to prepare aerated drinks
Identify the correct statement regarding CO_______________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. carbon is non-metal while silicon is semi-metal
B. CO2 is an independent molecule while SiO2 has network covalent structure
C. CO2 forms multiple bond while silicon does not form multiple bonds
D. Silicon has all sigma bonds
CO2 is gas while SiO2 is solid at room temperature? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Lubricants
B. Hydraulic brakes
C. Antifreeze
D. Water repellent
Which of the following is not a use of silicon ? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Na2B4O7.4H2O
B. Na2B4O7.5H2O
C. Na2B4O7.2H2O
D. Na2B4O7.10H2O
Aqueous solution of borax above 62°C gives crystals of________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Hall process
B. Thermite process
C. Haber process
D. Contact process
The process of aluminium extraction is called__________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Si
B. Ge
C. Se
D. Sn
Which one of the following is not a semiconductor ? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. A1
B. Si
C. B
D. C
Tincal is a mineral of___________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. boron
B. carbon
C. silicon
D. tin
Which of the following shows inert pair effect ? Read More »
Chemistry Mcqs, Group III A and IVA Elements