Group III A and IVA Elements

A. Beryllium
B. Carbon
C. Silicon
D. Aluminium

A. As antiseptic in medicine
B. For washing eyes
C. In soda bottles
D. For enamel and glazes

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

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

A. Lubricants
B. Hydraulic brakes
C. Antifreeze
D. Water repellent

A. Na2B4O7.4H2O
B. Na2B4O7.5H2O
C. Na2B4O7.2H2O
D. Na2B4O7.10H2O

A. Hall process
B. Thermite process
C. Haber process
D. Contact process

A. Si
B. Ge
C. Se
D. Sn

A. A1
B. Si
C. B
D. C

A. boron
B. carbon
C. silicon
D. tin