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Standard IX

Chemistry

Uses of Oxygen

Select the us...

Question

Select the uses of Oxygen.

For combustion

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Bleaching

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As an oxidant in rocket fuels.

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Artificial respiration.

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Solution

The correct options are
A
For combustion

B
Bleaching

C
As an oxidant in rocket fuels.

D
Artificial respiration.

Oxygen is used for combustion. It is used as an oxidant in rocket fuels. It is used for artificial respiration.

Also, oxygen-based bleaching agents are in use today.

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Similar questions

Q. 90%

H_{2} O_{2}

is used as an oxidant for rocket fuel with hydrazine.

Q. Which type of rocket fuels are already combined to the oxidizer in the combustion chaber?

Q. In a fuel cell, methanol is used as fuel and oxygen gas is used as an oxidizer.

The reaction is:

C H_{3} O H (l) + \frac{3}{2} O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l)

298 K

, standard Gibb's energies of formation for

C H_{3} O H (l), H_{2} O (l)

and

C O_{2} (g)

are

- 166.2, - 237.2

and

- 394.4 k J m o 1^{- 1}

respectively.

If standard enthalpy of combustion of methanol is

- 726 k J m o 1^{- 1}

, efficiency of the fuel cell will be:

Answer the following: [3 MARKS]

(1) When does a person need artificial respiration?
(2) From where can a person get the supply of oxygen for artificial respiration?
(3) Is artificial respiration needed temporarily or permanently?

Q. In a fuel cell (the device used for producing electricity directly from a chemical reaction) methanol is used as a fuel and oxygen gas is used as an oxidizer. The standard enthalpy of combustion of methanol is

- 726 k J m o l^{- 1}

. The standard free energies of formation of

C H_{3} O H (l) . C O_{2 (g)}

and

H_{2} O (l)

are

- 166.3, - 394.4

and

- 237.1 k J m o l^{- 1}

respectively.
The standard free energy change of the reaction will be:

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Select the uses of Oxygen.

The correct options are A For combustion B Bleaching C As an oxidant in rocket fuels. D Artificial respiration. Oxygen is used for combustion. It is used as an oxidant in rocket fuels. It is used for artificial respiration. Also, oxygen-based bleaching agents are in use today.

The correct options are
A
For combustion

B
Bleaching

C
As an oxidant in rocket fuels.

D
Artificial respiration.

Oxygen is used for combustion. It is used as an oxidant in rocket fuels. It is used for artificial respiration.

Also, oxygen-based bleaching agents are in use today.