Oxy-hydrogen flame is used for cutting and welding metals and glass.

True

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False

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Solution

The correct option is A True
Use of oxygen for welding and cutting purpose -
The burning of a mixture of oxygen and hydrogen produces a flame with a very high temperature (about 2800 $° C$ ), known as oxy-hydrogen flame.
It is used for cutting and welding metals and glass.
Burning acetylene with oxygen produces a very hot flame (about 3200 $° C$ ) called oxy-acetylene flame.
Oxy-acetylene flame is used for cutting and welding metals.
Therefore, the given statement is true.

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(b) A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.

(d) Apparatus for laboratory preparation of hydrogen should be air tight and away from a naked flame.

How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes? Explain.

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