Chemistry MCQS

131. When HPLC techniques are applied to ion exchange chromatography, it is known as:
A) HPLC chromatography
B) Ion exchange chromatography
C) Ion Chromatography
D) None of them

132. __ is defined as the “Vapor pressure of the solution is directly proportional to the mole fraction of solvent.”
A) Law of thermodynamics
B) Raoult’s law
C) Law of mass action
D) None of them

133. Out of Cu, Ag, Fe, and Zn, the metal that can displace all others from their salt solution is:
A) Ag
B) Cu
C) Zn
D) Fe

134. The conductivity of a strong electrolyte:
A) Increases on dilution slightly
B) Does not change on dilution
C) Decreases on dilution
D) Depends on the density of the electrolyte itself

135. About 50% of the earth’s crust including the water on the Earth and atmosphere is:
A) Hydrogen
B) Oxygen
C) Nitrogen
D) Oxygen

136. Acid rain is mainly caused by emissions of _ in the atmosphere.
A) Sulphur Dioxide
B) Nitrogen Oxide
C) Carbon Dioxide
D) Sulphur Dioxide and Nitrogen Oxide

137. What is the unit to measure the quantity of Ozone in the atmosphere?
A) Coulomb
B) Dobson
C) Quanta
D) Lumens

138. Which of the following has the least mass?
A) Electron
B) Neutron
C) Proton
D) None of these

139. Diamond is a very expensive ornament. It is made up of:
A) Silver
B) Gold
C) Carbon
D) Aluminum

140. The density of water is:
A) 400 kg/m3
B) 600 kg/m3
C) 800 kg/m3
D) 1000 kg/m3