1.

a) Kerosene burns with a blue flame in a wick stove but produces a yellow flame when burnt in a lamp.

Answer» <p>Partial combustion is due to lack of oxygen for burning. But in wick -stovekerosene burns with blue flame. Because in kerosene wickstovea perforated cylinder is placed around the burning wicks. Through these holes air is supplied continuously hence the keroseneoilvapour burns completely and produces blue flame.</p>


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