Graphite is a good conductor of electricity because it contains
Bonded electrons
Mobile electrons
Strong C = C bonds
Sp2 hybridization
Identify the correct statement with respect to CO
It combines with water to give carbonic acid
It combines with haemoglobin of the blood
It is a powerful oxidizing agent
It is used to prepare aerated water
Destructive distillation of coal does not give
Coke
Gas carbon
Carbides
Coal-tar
Which of the following is the chemically inactive allotropic form of carbon?
Diamond
Coal
Charcoal
Animal charcoal
Glass is soluble in
HF
H2SO4
HCIO4
Aqua- regia
When the destructive distillation of coal is done, the non-volatile residue left in the retort is
Option 4 Goes Here
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 statements is not correct?
Lead salts are slow poisons
Lead metals is used in accumulators
Plumbosolvency increases by the presence of carbonates, sulphate, phosphates etc.
Lead is a soft metal
Annealing is best described as
Slow and gradual cooling
Sudden and rapid cooling
Cooling by water
Very slow cooling
An alloy, which does not contain copper is
Bell metal
Brozone
Brass
Solder
