Air And Combustion Questions and Answers

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Chlorine water was exposed to sunlight for a few hours .Colourless gas F was collected in the boiling tube as shown.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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The diagram below represents a luminous flame. disgram of luminous flame Mark and label on the diagram the hottest and coolest parts

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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When a solid B was heated in a test-tube, it gave off two gases. The two gases were separated by passing them through a plug of glass wool in a test-tube as shown below.

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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When magnesium is burnt in air it reacts with both oxygen and nitrogen gas giving a white ash. Write two equations for the reactions that take place.

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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Study the flame shown below.

asked Aug 11, 2021 in Chemistry Form 1 by anonymous

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Under what conditions does the Bunsen burner produce the luminous flame?

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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A non-luminous flame is preferred for heating. Explain

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The following diagram represents a non-luminous flame of the Bunsen burner

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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State two situations where redox reactions are applied in industry

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Observe the equation below

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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State two similarities between rusting and combustion

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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In an experiment, a test-tube full of chlorine water was inverted in chlorine water as shown in the diagram below and the set up left in sunlight for one day.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The curve below represents the variation of temperature with time when pure and impure samples of a solid were heated separately.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Some moist iron wool was placed in a test tube and the tube inverted and placed in a beaker containing water. The apparatus was left for one week .It was observed that the iron wool had rusted and the water level had raisen.No further change took place when the set-up was left for more days even though not all the iron rusted.

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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Air was passed through several reagents as shown in the flow chart below

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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Name another gas which is used with oxygen in welding

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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State the uses of oxygen

asked Jul 28, 2021 in Chemistry Form 1 by davidkariukikinyanjui

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The Diagram below is set-up for the laboratory preparation of oxygen gas.

asked Jul 27, 2021 in Chemistry Form 1 by anony mous

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The diagrams below represent two iron nails with some parts covered tightly with zinc and tin respectively. What observations would be made at the exposed points R and Z if the wrapped nails are left in the open for several days? Explain.

asked Jul 27, 2021 in Chemistry Form 1 by anony mous

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