Which of the following way in used for classification of chromatography ?
A. Shape
B. Phase
C. Mechanism
D. All
Submitted by :- Jamil Ahmed
Neutrons moving with an energy of 1.2 MeV are called_______________?
A. Fast neutrons
B. Slow neutrons
C. Moderate neutrons
D. All are possible
Submitted by :- Jamil Ahmed
When 6d orbital is complete the entering electron goes into_________________?
A. 7f
B. 7s
C. 7p
D. 7d
Submitted by :- Jamil Ahmed
Centrifugal forces are balanced in atom by__________________?
A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons
Submitted by :- Jamil Ahmed
In CCI4 I2 shows________________?
A. Red colour
B. Purple colour
C. Blue colour
D. Yellow colour
Submitted by :- Jamil Ahmed
Crystallization does not involve_______________?
A. heating
B. sublimation
C. cooling
D. vaporization
Submitted by :- Jamil Ahmed
Animal charcoal adsorbs the coloured_________________?
A. impurities
B. crystals
C. solvents
D. both A & B
Submitted by :- Jamil Ahmed
Ratio of the amount of solute in organic and aqueous solvent is________________?
A. Retardation factor
B. Distribution co-efficient
C. Distribution in aqueous solution
D. All statements are wrong
Submitted by :- Jamil Ahmed
95% ethanol is called_________________?
A. methylated spirit
B. wood spirit
C. rectified spirit
D. absolute alcohol
Submitted by :- Jamil Ahmed
Which of the following technique is simple and efficient to purify a substance____________________?
A. Filtration
B. Sublimation
C. Crystallization
D. Solvent extraction
Submitted by :- Jamil Ahmed