Silica gel and alumina are used as __________________?
A. Mobile phase
B. Stationary phase
C. Mixed phase
D. Single phase
Submitted by :- Jamil Ahmed
mnsoomro
Safe and the most reliable method of drying crystals is through______?
A. Filter paper
B. Vacuum desiccators
C. Oven
D. None of these
Submitted by :- Jamil Ahmed
A process controlled by Distributive law is__________________?
A. Crystallization
B. Sublimation
C. Solvent extraction
D. Filtration
Submitted by :- Jamil Ahmed
Different components of a mixture have different Rf values due to_____?
A. Polar solvent used
B. Combination of solvents used
C. Their different distribution coefficients in the solvent
D. Distributive law
Submitted by :- Jamil Ahmed
Force responsible to hold atoms together in a compound is called ____?
A. Bond
B. Attractive force
C. Interaction
D. All of above represent same entity
Submitted by :- Jamil Ahmed
Measurement of the degree of polarity is___________________?
A. Electron affinity
B. Ionic character
C. Ionization energy
D. Dipole moment
Submitted by :- Jamil Ahmed
In O2 each oxygen atom is hybridized_________________?
A. sp3
B. sp2
C. sp
D. All
Submitted by :- Jamil Ahmed
Which of the following is the best explanation that CO2 is non polar molecule __________________?
A. Linear geometry
B. Dipole moment is zero
C. Sp hybridization
D. None
Submitted by :- Jamil Ahmed
The octet rule does not always hold for which of the following elements _________________?
A. C
B. O
C. F
D. P
Submitted by :- Jamil Ahmed
Which type of bond is formed by overlap of p orbitals _______________?
A. Pi
B. Sigma
C. Both
D. Neither
Submitted by :- Jamil Ahmed