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Fill in the blanks:1. ....................discovered the oxygen gas.2. Oxygen is slightly................. than air.3. Manganese dioxide acts as a.................4. Oxygen is collected by the................. displacement of................ 5. Oxygen occupies about ................ of air by volume.6. Oxygen is.............. to litmus testing. |
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Answer» 1. Joseph Priestley discovered the oxygen gas. 2. Oxygen is slightly heavier than air. 3. Manganese dioxide acts as a catalyst. 4. Oxygen is collected by the downward displacement of water. 5. Oxygen occupies about 1/5th of air by volume. 6. Oxygen is neutral to litmus testing. |
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