Question # 1

The enthalpy of reaction 2H2 +O2-----2H2O

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-571.6 kJ

-110.5 kJ

-393.5 kJ

+53.8 kJ

During the glycolysis net ATP produced are.

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2

4

6

8

The enthalpy of reaction C+O2 ------ CO2

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-571.6 kJ

-393.5 kJ

+53.8 kJ

-110.5 kJ

All chemical reaction involves.

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Enzymes

Catalyst

Energy changes

All of these

The enthalpy of reaction H2+I2--- 2HI

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-571.6 k J

+53.8 kJ

11 kJ

-393.5 kJ

The part of the universe that we want to focus our attention called.

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Surrounding

Energy

System

Both a and b

When new bonds ae formed, the energy is

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Consume

Remain same

Release

None of these

Who use the word energy for the 1st time

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Rutherford

Bohr

Thomas Young

None of these

Washing clothes at 140 ^oF uses almost the energy as at 140 ^oF wash

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Half

Thrice

Twice

None of the above

--------------- of the energy used by traditional electric bulb is wasted in producing heat.

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60%

50%

70%

90%

No reaction occurs if the energy of reacting particles.......activation energy.

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Lower than

Greather than

Nearest to

Equal to

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

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Chemistry 9th Class English Medium Unit 5 Online Test MCQs With Answers

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