Ce58 is a member of:
A. S-block
B. P-block
C. d-block
D. f-block
Basicity of orthophosphoric acid is:
A. 2
B. 3
C. 4
D. 5
Gypsum is:
A. CaSO4
B. CaSO4.1/2H2O
C. CaSO4,2H2O
D. CaSO4.3H2O
Parke’s process is used in the extraction of:
A. Iron
B. Sodium
C. Silver
D. Zinc
Which metal is used as a reducing agent in Smelting:
A. C
B. Zn
C. Al
D. Cu
A process used for the Concentration of Ore is:
A. Roasting
B. Forth flotation
C. Electrolysis
D. Distillation
Which Oxide of Manganese is amphoteric?
A. MnO2
B. Mn2O3
C. Mn2O7
D. MnO
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
Find the PH of a 0.001 M solution of Nitric acid HNO3?
A. 2
B. 3
C. 4
D. 5
