- (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
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- (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
- (A) 1
- (B) 3
- (C) zero
- (D) 2
- (A) 260°C
- (B) 360°C
- (C) 630°C
- (D) 620°C
- (A) Phosphine
- (B) Phosphorus
- (C) Water
- (D) Phosphorus pentoxide
