Theories of Catalysis

Q. 13. NH3 converts into N2 and H2 according to the following equation:-2NH3 = N2 + 3H2. x% of NH3 is converted into product. Rate if diffusion of gaseous mixture is double than that of SO2 under identical conditions. Calculate x. 1)98.23% 2)31.25% 3)25.27% 4)6.25%

Q. 47. Consider the following reaction: Reagents Glucose ------------------->Mannose The above reaction is known as: (a) Anomerisation (b) Racemisation (c) Epimerisation (d) Conversion.

Q. Given below, catalyst and corresponding process/reaction are matched. The mismatch is

1. $\left[RhCl\right(PP{h}_3{)}_3]$ : hydrogenation
2. $T_{i}C{l}_4+Al(C_2{H}_5{)}_3$ : polymerization
3. $V_2{O}_5$ : Haber-Bosch process
4. nickel: hydrogenation

Q. 26. Explain the three essential conditions for Hybridization with reference to BeCl2

Q. what is hybridisation of nh+

Q. 13. Cu2S acts as reducing or oxidising or both, agent?

Q.

Which of the following types of metals make the most efficient catalysts [DPMT 1985]

1. Alkali metals

2. Transition metals

3. Alkaline-earth metals

4. Radioactive metals

Q. Potential energy difference between the reactant and activated complex is called. The minimum amount of energy needed for the particles to react is

1. threshold energy
2. activation energy
3. kinetic energy
4. potential energy

Q. hybridization of N in NO2+ , NO3- and NH4+ are

Q.

sol has a negative charge. Capacity to precipitate it is highest in

[CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

1. 
2. 
3. 
4. 

Q. A reversible process is isoenthalpic at isothermal condition .Prove it.

Q. $i\left)2H_2{O}_2\stackrel{}{\underset{\mathrm{Pt}}{\to }2H_{2}O+O_2}\mathrm{ii}\right)2H_2{O}_2\stackrel{}{\underset{\mathrm{Glycerol}}{\to }2H_2}O+O_2$
What is the role of $Pt$ and glycerol in the above reaction?

1. Both act as negative catalysts
2. Both act as positive catalysts
3. $Pt$ acts as a negative catalyst and glycerol acts as a positive catalyst
4. $Pt$ acts as a positive catalyst and glycerol acts as a negative catalyst