Types of Catalysis

Q. An example of autocatalysis is

1. oxidation of NO to $N{O}_2$
2. oxidation of $S{O}_2$ to $S{O}_3$
3. decomposition of $KCl{O}_3$ to KCl and $O_2$
4. oxidation of oxalic acid by acidified $KMn{O}_4$

Q. Upon boiling, why Mg(HCO3)2 converted to Mg(OH)2 but Ca(HCO3)2 converted to CaCO3?

Q. Adsorption theory of heterogenous catalyst fails to explain the action of catalytic poisons and catalytic promoters

1. True
2. False

Q.

The enthalpy of atomization for the reaction $C{H}_4\left(g\right)\to C\left(g\right)+4H\left(g\right)$ is$1665kjmo{l}^{-1}$ What is the bond energy of $C-H$ bond?

Q.

An example of homogeneous catalysis is:

1. Contact process

2. Haber’s process

3. Lead chamber process

4. Hydrogenation of oils

Q.

The reaction H₂S + H₂O₂ → SO₂ + 2H₂O manifests

1. Oxidizing action of H₂O₂

2. Reducing nature of H₂O₂

3. Acidic nature of H₂O₂

4. Alkaline nature of H₂O₂

Q. When HCL react with Fe it form FeCl2 not FeCl3 why?

Q. During the adsorption of reactant molecules on a catalyst surface:

1. $△G=-ve,△H=-ve,△S=+ve$
2. $△G=-ve,△H=-ve,△S=-ve$
3. $△G=+ve,△H=-ve,△S=-ve$
4. $△G=+ve,△H=+ve,△S=+ve$

Q.

If Pt is used as catalyst in the decomposition of $H_2{O}_2$, then it is an example of

1. Homogeneous catalysis

2. Heterogenous catalysis

3. Negative catalysis

4. Auto catalysis

Q.

expalin with the help of chemical equations the principle involed in the estimation of S present in the organic compound by carius method