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10Oxygen makes up about 21% of the atmosphere by volume.
Joseph Priestley prepared oxygen by heating potassium chlorate.
Oxygen is slightly heavier than air.
Oxygen turns red litmus paper blue.
Oxygen gas is partially soluble in water.
Oxygen supports burning.
Oxygen liquefies at −183°C.
Manganese dioxide acts as a catalyst in the preparation of oxygen.
Oxygen is used in the manufacture of steel.
Oxygen gas has a strong smell.
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Which one of the following compound is heated to obtain oxygen gas ?
Which of the following compounds is formed when magnesium is burnt with oxygen?
Who gave the name oxygen?
Oxygen was first prepared by heating:
In laboratory, oxygen is collected by:
Which substance decomposes without heating to give oxygen?
When carbon burns in oxygen, it forms:
Oxygen is used by living beings for:
The flame becomes brighter in presence of:
Oxygen is used in welding with:
The symbol of oxygen is ______.
The atomic number of oxygen is ______.
The ______ formula of oxygen gas is O₂.
Oxygen was first prepared by ______.
Oxygen is prepared in laboratory by heating ______
______ is used as a catalyst in the heating method.
Oxygen ______ at −219°C.
When magnesium burns in oxygen, it forms ______.
During respiration, glucose reacts with ______.
Oxygen is used in ______ respiration.