Q10 of 27 Page 1

How do automobiles fit with catalytic converters reduce air pollution? Suggest the best fuel for such vehicles.

Catalytic converters, having expensive metals namely platinum-palladium and rhodium as the catalyst, are fitted into automobiles for reducing the emission of poisonous gases. On passing the exhaust through the catalytic converter,



Motor vehicles equipped with catalytic converter should use unleaded petrol because the lead in petrol can inactivate the catalyst.


Hence lead free petrol and diesel are best choices for such vehicles.


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State the Mendelian principle which can be derived from a dihybrid cross and not from monohybrid cross.

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Comment upon the mode of pollination in Vallisneria and Eichhornia which have emergent flowers.