741. In alkaline battery the anode is made up of______________________?
A. MnO2
B. Zn
C. AgO2
D. cadmium

742. Apparent charge on atom in molecule is___________________?
A. valency
B. coordination number
C. oxidation number
D. charge number

743. In K2Cr2O7 the oxidation number of chromium is____________________?
A. 7
B. 6
C. -7
D. -6

744. The reduction potential Zn is_________________?
A. 0.76
B. -0.76
C. -0.55
D. 0.55

745. Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is____________________?
A. 2
B. 6
C. 4
D. 8

746. The oxidation number of central metal atom in [Ni(CO)4] is_________________?
A. 0
B. 2
C. 4
D. 6

747. Group VIB of transition elements contains___________________?
A. Zn Cd Hg
B. Fe Ru Os
C. Cr Mo W
D. Mn Te Re

748. The leements in which d or f orbitals are in the process of completion are__________________?
A. outer transition elements
B. inner transition elements
C. typical transition elements
D. transition elements

749. The melting points and boiling points upto meddle of 3d- series ____________________?
A. increases
B. decreases
C. remain same
D. no regular trend

750. Pure metal__________________?
A. corrode slowly
B. corrode rapidly
C. does not corrode easily
D. none of these