Charcoal is mainly prepared by
destructive distillation
fractional distillation
fractional crystallisation
steam distillation
Soda ash is
NaHCO3
NaCl
Ca (HCO3)
Na2CO3
...... carbon is formed when a material containing carbon is burned without enough oxygen.
Allotrophy
Amorphous
Crystalline
Catenation
Which doesn't show allotropy?
Carbon
Sulphur
Phosphorous
Mercury
Name the most abundant element in human body?
Hydrogen
Oxygen
Calcium
A chemical mixed with LPG to detect its leakage is called
Ethyl mercaptan
Methyl mercaptan
Methyl isocyanide
Ethyl chloride
Valency of carbon in methane is
1
2
3
4
Dry ice is
Solid ice
Solid sodium
Solid NaCl
Solid CO2
