Related Questions

A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
D 28
Singular of alum' is-
A alumni
B alumny
C alumnus
D alumnas
The alum, when added as a coagulant in water
A Does not require alkalinity in water for flocculation
B Does not affect pH value of water
C Increases pH value of water
D Decreases pH value of water
Starting raw material for the manufacture of alum is
A Alumina
B Gypsum
C Bauxite
D Ammonium bicarbonate
Alum is commercially produced from
A Gypsum
B Feldspar
C Galena
D Bauxite
Alum is used as
A An analgesic
B A fertilizer
C A disinfectant
D A purifier for water
Alum stops bleeding in minor cuts because of
A Solvation
B Emulsion
C Dialysis
D Coagulation
Muddy water is treated with alum in purification process, it is termed as :
A Emulsification
B Absorption
C Adsorption
D Coagulation
Alum as a coagulant is found to be most effective when pH range of water is
A 2 to 4
B 4 to 6
C 6 to 8
D 8 to 10
Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these

Next steps