Carbon and Compounds

CARBON AND COMPOUNDS

Oxides of Carbon

Carbon Monoxide

PREPARATION

Lab method

 

Manufacture

(a) Air

(b)  Steam (water gas synthesis gas or blue gas )



Other methods

Heating with

 

PROPERTIES

Neutral, colourless, poisonous, burns with blue flame. Sparingly soluble in water. With haemoglobin it gives “carboxy haemoglobin” which destroys its capacity to supply oxygen to the body.

 

Burning - Non supporter of combustion. Burns in air with blue flame.

Reduces ammoniacal AgNO3

         

Reduces Fehling-solution

Reducing nature - Metal oxides are reduced to metals.

                   

Unsaturated nature - It gives addition products.

 

 

Formation of metal carbonyls - It acts as lewis base.

 

USES

In metallurgy of Ni-Monds process

Manufacture of methanol, phosgene, synthetic petrol, as reducing agent.

 

Carbon Dioxide

PREPARATION

Lab method

 

Manufacture

·                    

·                     Fermentation

·                     From fuel gases

PHYSICAL PROPERTIES

Colourless, 1.5 times heavier than air, can be poured downwards like .Animals die in its presence due to lack of , it is also known as black damp.

CHEMICAL PROPERTIES

Stability - Fairly stable, decomposed at 1775K.

Incombustible and non-supporter of combustion but active metals e.g. Mg, Na, K continue burning in a jar of the gas. 

Acidic nature

 

Lime water

 

Reduction

 

Photosynthesis