Which part of the Bunsen burner flame is the hottest?A. the black partB. the blue flameC. the yellow flameD. none of the above

The innermost zone of flame of a candle isA Yellow B Blue C Black D White

The innermost part of the flame has very least temperature.A.TrueB.False

When a Bunsen burner is lit and not being used for heating things, a _________ flame should be used. What one word completes this sentence?

When lighting a Bunsen burner, you should always:

A student was asked by his teacher to perform a flame test on a solid. He used this method.● dip the tip of a clean platinum wire into hydrochloric acid and then into the solid● adjust the air hole of the Bunsen burner to obtain a non - roaring, non – luminousBunsen flame● place the tip of the platinum wire into the edge of the flame● observe the colour in the flame(a) (i) why is it important that the platinum wire is clean?(iii) Why is it important to use a non - luminous flame?(iv) What color would be observed in the flame if the solid contained sodium ions?