A process used for the Concentration of Ore is________?
(A) Roasting
(B) Forth flotation
(C) Electrolysis
(D) Distillation
The purpose of Smelting an ore is to________?
(A) Reduce it
(B) Oxidize it
(C) Obtain an alloy
(D) Separate volatile impurities
Which set of quantum numbers is not allowed?
(A) n=2,l=1,m1=0,ms=+1/2
(B) n=2,l=1,m1=-1,ms=+1/2
(C) n=2,l=0,m1=0,ms=-1/2
(D) n=2,l=2,m1=1,ms=-1/2
Potassium Permanganate is used for purifying drinking water, because_________?
(A) It is a sterilising agent.
(B) It dissolves the impurities of water.
(C) It is a reducing agent.
(D) It is an oxidising agent.
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
(A) Bromine
(B) Fluorine
(C) Chlorine
(D) Sulphur