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Chemistry

Chemistry
The noble gas used in radiotherapy is

Xenon
Argon
Neon
Radon

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Chemistry
Which one of the following gases has the highest calorific value?

Water gas
Coal gas
Natural gas
Indane gas

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Chemistry
Which of the following is not a natural source of hydrocarbon?

Petroleum
Coal
Mica
Natural Gas

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Chemistry
The quality of petrol is expressed in terms of

Added unlead compounds
Octane number
Cetane number
Gold number

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Chemistry
The gas used in the manufacture of vanaspati from vegetable oil is

oxygen
carbon dioxide
hydrogen
nitrogen

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Chemistry
Which one of the following is used for dating very old objects of archaeological importance?

Carbon-14
Radium
Tritium
Phosphorus-31

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