Chemistry
Give reasons for the following:
(a) patients suffering from lung problems are kept in an oxygen tent.
(b) oxygen finds utility in welding & cutting of metals.
Answer
(a) Oxygen tents provide artificial supply of extra oxygen to help patients with lung problems breathe easier. This reduces the load on the patient's lungs helping them to work better.
(b) A mixture of oxygen with gases like hydrogen or acetylene on burning, produces high temperature flames of around 2800°C to 3000°C. Such high temperature flames are suitable for melting metals quickly. Hence, oxygen finds utility in welding & cutting of metals.
Related Questions
Distinguish between Combustion and Rusting with suitable word equations only.
Give the main experimental points only to demonstrate that —
(a) magnesium
(b) candle
gains weight on burning.
Match the statements in List I with the correct answer from List II.
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Acid rain has caused damage to heritage structures such as the Taj Mahal.
In the laboratory preparation of oxygen from potassium chlorate – manganese dioxide is added to the reactant.
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Oxidation of sulphur results in a product which turns moist blue litmus red.
Combustion and respiration show similarity.