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.

Blood does not coagulate inside the body due to the presence of___________?

A. Haemoglobin
B. Fibrin
C. Heparin
D. Plasma

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

The light of distant stars is affected by __________ ?

A. The earth’s atmosphere
B. Interstellar dust
C. Both a and b
D. None of these

Main and excessive part of plasma consists of ________?

A. Carbon dioxide
B. Oxygen
C. Water
D. Glucose

The purpose of Smelting an ore is to________?

A. Reduce it
B. Oxidize it
C. Obtain an alloy
D. Separate volatile impurities

Which Oxide of Manganese is amphoteric?

A. Mno2
B. Mn2o3
C. Mn2o7
D. Mno

A process used for the Concentration of Ore is________?

A. Roasting
B. Forth flotation
C. Electrolysis
D. Distillation

Which metal is used as a reducing agent in Smelting______?

A. C
B. Zn
C. Al
D. Cu

Parke’s process is used in the extraction of________?

A. Iron
B. Sodium
C. Silver
D. Zinc