In group IVA or 14 of the extended form of the periodic table, with increase in atomic number, the metallic character.
Increase
Decrease
Remains the same
First increases then decreases
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
When the destructive distillation of coal is done, the non-volatile residue left in the retort is
Gas carbon
Coke
Coal-tar
Option 4 Goes Here
CO forms a volatile compound with
Nickel
Copper
Sodium
Aluminium
Ordinary glass is
Sodium silicate
Copper silicate
Calcium silicate
A mixture of calcium and sodium silicates with silica
An alloy, which does not contain copper is
Bell metal
Brozone
Brass
Solder
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 not hydrolyzed?
CCI4
SiCI4
SnCI4
PbCI4
Which one of the oxides is neutral?
CO
SnO2
AnO
SiO2
Glass is soluble in
HF
H2SO4
HCIO4
Aqua- regia