The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
A. 3
B. 2.7
C. 2
D. 1.5
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Molozonide is unstable and changes into ozonide on_________________?A. reduction
B. oxidation
C. hydrolysis
D. rearrangementWhat is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?A. Radium dating
B. Uranium dating
C. Carbon dating
D. Deuterium datingThe correct electronic configuration of Cr is____________________?
The correct electronic configuration of Cr is____________________?A. [Ar]4s23d4
B. [Ar] 4s23d4
C. [Ar]4s03d5
D. [Ar]4s13d5Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?A. The nature of its oxides
B. The charge on its ions
C. The formula of its oxide
D. Its number of isotopesAcetic anhydride can be obtained by treating ethyl alcohol with___________________?
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?A. P2O5
B. H2SO4
C. Both A and B
D. PCI5Calculate % of N in KNO3__________?
Calculate % of N in KNO3__________?A. 14.34%
B. 18.56%
C. 13.86%
D. None of these