Chemistry MCQS

831. Chromatography phenomenon is based on _.
A. Separation
B. Precipitation
C. Filtration
D. Distribution

832. Chromatography in which the stationary phase is liquid is called __.
A. Absorption chromatography
B. Adsorption chromatography
C. Partition Chromatography
D. None

833. Paper Chromatography is a type _.
A. Absorption chromatography
B. Partition Chromatography
C. Adsorption Chromatography
D. None

834. The technique in which the solvent travels upwards by capillary actions is _.
A. Ascending
B. Descending
C. Radial
D. Circular

835. The paper which dried spots is dipped into the solvent mixture with the depth of _.
A. 1-2 CM
B. 5-6 Cm
C. 1-2 MM
D. 5-6 MM

836. Main constituent of bio gas is?
(A) Acetic acid
B. Methane
(C) Methyl alcohol
(D) Oxygen

837. Size of the atom in positive ion decreases because?
A. Imbalance number of protons
B. Outermost shell loses
C. Both of the above
D. None of the above

838. Smaller size of cations in Lanthanides is called?
(A) Lanthanide expansion
B. Lanthanide contraction
C. Lanthanide valency
D. None of the above

839. The necessary condition for the equilibrium for an isolated system is that its entropy shall be?
(A) Less than zero
B. Zero
C. Minimum
D. Maximum

840. For a Van Der Waals gas, the critical compressibility factor, Ze should have the value at the critical point to be?
A. 0.375
B. Unity
C. Equal to the number of moles
D. Greater than unity