801. In Pakistan and other countries, which of the following methods is used in the manufacture of sulfuric acid?
(A) Frasch method
(B) Haber’s process
C. Contact process
(D) Ostwald’s method
802. The process of smelting and cooling converts pig iron into?
(A) Steel
(B) Wrought Iron
C. Cast Iron
(D) Silicon steel
803. Pure iron is obtained by the reduction of which of the followings in the blast furnace?
(A) Magnetite
(B) Limonite
C. Iron Oxide
(D) Haematite
804. Which substance is known as oil of vitriol?
(A) Hydrochloric Acid
(B) Nitric Acid
C. Sulfuric Acid
(D) Hexane
805. Hypochlorous acid HClO is unstable and readily liberates:
(A) CIO
B. Atomic Oxygen
(C) Atomic Chlorine
(D) Atomic Hydrogen
806. Space rockets use fuel which is liquid oxygen mixed with liquid?
(A) Nitrogen
(B) Chlorine
C. Hydrogen
(D) Helium
807. Which method is used for the purification of bauxite containing excess silica SiO2 as an impurity?
(A) Hoope’s Method
B. Serpek’s Method
(C) Baeyer’s Method
(D) Hall’s Method
808. The estrogenic hormones are secreted by __.
A. An anterior lobe of the pituitary
B. The posterior lobe of the pituitary
C. The Follicle
D. The corpus Luteum
809. __ is a condition in which the number of cells is constantly both for the entire animal and for each given organ in all the animals of that species.
A. Protandry
B. Eutely
C. Syngamy
D. None of the above
810. Elements in the same vertical group of the periodic table have the same______.
A. Number of Valence electrons
B. Atomic Number
C. Atomic Mass
D. Atomic Volume
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