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Statement I : Combustion of all organic ...

Statement I : Combustion of all organic compounds is exothermic in nature.
Statement II : The enthalpies of all elements in their standard states are zero.

A

both Assertion and Reason are true and Reason is the correct explanation of Assertion

B

both Assertion and Reason are true and Reason is not correct explanation of Assertion

C

both Assertion and Reason are false

D

Assertion is false but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound:

    A
    is always negative
    B
    is always positive
    C
    may be positive or negative
    D
    is never negative

  • Statement I: The dissolution of ammonium nitrate increase steeply with increase in temperature. Statement II: The dissolution process of ammonium nitrate is endothermic in nature.

    A
    Statement I and II are correct and statement II is the correct explanation of statement I.
    B
    Statement I and II are correct but II is not the correct explanation of I.
    C
    Statement I is wrong but II is wrong.
    D
    Statement I is wrong but II is correct.

  • Statement I : In a combustion reaction in the air, oxygen is the limiting reagent. Statement 2 : Oxygen is present in limited amount ( only 21%) in air.

    A
    Statement ( 1) is true, Statement ( 2) is true, Statement ( 2) is the correct explanation for Statement ( 1) .
    B
    Statement ( 1) is true, Statement ( 2) is true, Statement ( 2) is not the correct explanation for Statement ( 1) .
    C
    Statement (1) is true, Statement ( 2) is false.
    D
    Statement (1) is false , Statement ( 2) is true.

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