141. Which of the following is pseudo solid_____________________?
A. CaF2
B. NaCl
C. Glass
D. Diamond
142. Bohrs model is contradicted by__________________?
A. Plancks theory
B. Dual nature of matter
C. Heisenbergs uncertainty principle
D. All of these
143. Atomic radius can be determined by_________________?
A. X – ray diffraction
B. Spectrophotometer
C. Optical microscope
D. Electron microscope
144. For which system does the equilibrium constant Kc has unit of (concentration)-1__________________?
A. N2+3H2 2NH3
B. H2+I2 2HI
C. 2NO2 N2H4
D. PCI5 PCI3+CI2
145. 18g glucose is dissolved in 90g water the relative lowering in vapour pressure is equal to ___________________?
A. 8
B. 5.1
C. 6
D. one/fifty one
146. Stronger is the oxidizing agent greater is the___________________?
A. Oxidation potential
B. Redox potential
C. e.m.f of cell
D. standard reduction potential
147. Which is true about Zn-Cu galvanic cell ?
A. Reduction occurs at anode
B. K+ ion transfer from salt bridge to left beaker of ZnSO4
C. Oxidation occurs at cathode
D. Anode is negatively charged
148. Nitrates of which pair gives different products on thermal decomposition___________________?
A. Na K
B. Mg Ca
C. Li Na
D. Li Ca
149. A real gas obeying vander waals equation will resemble the ideal gas if_______________________?
A. Both a and b are small
B. Both a and b are large
C. a is small and b is large
D. a is large and b is small
150. Plasma is used in_________________?
A. Fluorescent bulb
B. Neon signs
C. Lasers
D. All of these