Describe some features of catalysis by zeolites.
Zeolites are alumino-silicates that are micro-porous in nature. Zeolites have a honeycomb-like structure, which makes them shape-selective catalysts. They have an extended 3D-network of silicates in which some silicon atoms are replaced by aluminium atoms, giving them an Al−O−Si framework. The reactions taking place in zeolites are very sensitive to the pores and cavity size of the zeolites. Zeolites are commonly used in the petrochemical industry.
1. Detergents clean surfaces on the principle of
2. Ozone layer of atmosphere absorbs:
3. The process of sudden cooling is known as -
4. Question 4.37:Write the significance of a plus and a minus sign shown in representing the orbitals.
5. The chemical name of 'Hypo' commonly used in photography is
6. Which of the following fuels causes minimum environmental pollution?
10. Vinegar is