Electrolytic Cell (8)

Science

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Procedure in moist blue litmus paper test (3)

If the colour of the moist blue litmus paper bleaches, the gas in the test tube is halogen gas

Procedure in moist blue litmus paper test (4)

If the moist blue litmus paper does not change colour, the gas in the test tube is alkaline or neutral

Procedure in moist red litmus paper test (1)

Place a piece of moist red litmus paper close to the mouth of the test tube containing the gas

Procedure in moist red litmus paper test (2)

If the moist red litmus paper turns blue, the gas in the test tube is alkaline

Procedure in moist red litmus paper test (3)

If the moist red litmus paper does not change colour, the gas in the test tube is acidic or neutral

Procedure in glowing wooden splinter test (test for oxygen gas)

Insert a glowing wooden splinter into the test tube containing the gas

Procedure in glowing wooden splinter test (test for oxygen gas) (2)

If the glowing wooden splinter ignites, the gas in the test tube is oxygen

Procedure in burning wooden splinter test (test for hydrogen gas) (1)

Bring a burning wooden splinter close to the mouth of the test tube containing the gas

Procedure in burning wooden splinter test (test for hydrogen gas) (2)

If the gas explodes with a ‘pop’ sound, the gas in the test tube is hydrogen

The purpose of glowing wooden splinter test

Test for the presence of oxygen gas

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