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