Which one of the oxides is neutral?
CO
SnO2
AnO
SiO2
Ordinary glass is
Sodium silicate
Copper silicate
Calcium silicate
A mixture of calcium and sodium silicates with silica
If CO2 is passed in excess into limewater, the milkiness first formed disappears due to.
Reversal of the original reaction
Formation of volatile calcium derivative
Formation of water soluble calcium bicarbonate
The solution getting heated by exothermic reaction
Which of the following is not hydrolyzed?
CCI4
SiCI4
SnCI4
PbCI4
For complete combustion of a fuel we shall need
High temperature
An excess of air
High air pressure
An excess of air and high temperature
Which of the following is the chemically inactive allotropic form of carbon?
Diamond
Coal
Charcoal
Animal charcoal
Number of unpaired electrons in the ground state of the carbon atom is
2
3
4
1
When steam is passed through red hot coke
CO2 and H2 are obtained
CO and B2 are formed
CO and H2 are obtained
Petrol gas is obtained
An important ore of lead is
Magnesite
Carnallite
Bauxite
Galena
Destructive distillation of coal does not give
Coke
Gas carbon
Carbides
Coal-tar
