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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…
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