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Flame Characteristics

The gas used ...

Question

The gas used in welding and cutting metals is _______.

A

Propene

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B

Ethyne

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C

Ethane

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D

Ethene

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Solution

The correct option is B
Ethyne

The gas used in welding and cutting metals is Ethyne.Welding and cutting of metals require high temperature. The combustion of ethyne with oxygen produces a flame of over 3,600 K (3,300 °C, 6,000 °F), releasing 11.8 KJ/g, thus making it appropriate for cutting and welding.

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Similar questions

Q. Explain the following:
(i) Ethene and ethyne burn with a sooty luminous flame.
(ii) Ethane does not undergo addition reactions.
(iii) Ethyne is used for welding and cutting metals.

Q. Classify into alkanes, alkenes and alkynes :

Ethane, ethene, methane, ethyne, propene, propyne

Q. Arrange the following hydrocarbons in the increasing order of volume of oxygen required for complete combustion per mole under the same conditions.
(a) Ethane (b) Propyne (c) Ethyne (d) Propene (e) Propane (f) Ethene

Select from the list the gas that matches the descriptions given in each case:

[ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne]

This gas is used for welding purpose.

Q. Give a chemical test to distinguish between:
(a) saturated and unsaturated compounds
(b) ethane and ethene
(c) ethene (ethylene) and ethyne (acetylene).

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