chemistry Quiz
Question Number 1
Which is the hardest substance after diamond?
A. Silicon carbide
B. Bauxite
C. Chalcopyrite
D. Hematite
Question Number 2
name the fuel used in welding.
A. Ethanol
B. Butane
C. Acitilin
D. Charcoal
Question Number 3
What is the ignition temperature of white phosphorous?
A. 48 degree C
B. 15 degree C
C. 35 degree C
D. 72 degree C
Question Number 4
What are the constituents of the alloy magnalium?
A. Aluminium and copper
B. Magnesium and Aluminium
C. Copper and tin
D. Magnesium and Maganese
Question Number 5
Which is the fifth element?
A. Potassium
B. Sodium
C. Berelium
D. Boron