The combustion reaction, C + O2 = CO2, is__________________?
(A) Exothermic
(B) Endothermic
(C) Autocatalytic
(D) None of these
BHC (Benzene hexachloride) is made by the chlorination of benzene_____________________?
(A) Which is an addition reaction
(B) Which is a substitution reaction
(C) In absolute dark
(D) In presence of sunlight
Plasticisers are added to paints to______________________?
(A) Make it corrosion resistant
(B) Make glossy surface
(C) Give elasticity & prevent cracking of the film
(D) Increase atmospheric oxidation
Starting raw material for the manufacture of alum is_________________?
(A) Alumina
(B) Gypsum
(C) Bauxite
(D) Ammonium bicarbonate
In the manufacture of viscose rayon, the raw material used industrially is ____________________?
(A) Eucalyptus wood
(B) Bamboo
(C) Bagasse
(D) Fine teak wood
Rotary kiln is not involved in the production of___________________?
(A) Cement
(B) Lime from limestone
(C) Slaked lime from quick lime
(D) None of these
______________ is an ore concentrating metallurgical process involving a chemical change?
(A) Electromagnetic separation
(B) Froth floatation
(C) Roasting
(D) None of these
Solvent used for extraction of oil is_____________________?
(A) Hexane
(B) Methyl ethyl ketone
(C) Furfural
(D) None of these
Cooking liquor in case of sulphite process is _____________________?
(A) Sodium sulphite and sodium bisulphite
(B) Magnesium sulphite and free SO2 in acid medium
(C) Magnesium sulphate and magnesium bicarbonate
(D) None of these
Salt cake is chemically represented by_________________?
(A) Na2SO4
(B) CaSO4. ½H2O
(C) MgSO4
(D) BaSO4