Aromatic oils dissolved in alcohol is used in the manufature of ,
Medicines
Perfumes
Chlorophyll
Petrol
Which is known as gypsum?
Na2SO4 10H2O
CaSO4 .2H2O
FeSO4.7H2O
CuSO4.5H2O
Crystalline hydrated salts which are exposed to the atmosphere loses their moisture partially or completely to the atmosphere and change into the amorphous state is called as
Deliquescent
efflorescent
Hygroscopic
Drying agent
Steam is passed over red hot coke what is the product?
Water gas
Producer gas
Marshal gas
Coing gas
The resulting solution obtained when calcium reacts with water is___________in nature
Neutral
Acidity
Alkaline
Pure
Which is known as Glauber's salt?
Na2 CO3
CuSO4 5H2O
FeSO4 7 H2O
Na2so4 10 H2O
Which does not react with cold or boiling water?
Aluminium
Sodium
Potassium
Calcium
The reaction of cold water with_____________is comparitively less exothermic and vigorous
Magnesium