Out of graphite and diamond, which one refers to the standard ra

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 Multiple Choice QuestionsShort Answer Type

61.

Out of the following different forms of oxygen, which will have the standard enthalpy of the formation to be 0.0 kJ;  O, O2(g), O3(g), O2(l)?

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62.

Out of graphite and diamond, which one refers to the standard rate?


Graphite is referred to the standard rate.

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63.

What is the value of enthalpy of neutralisation of a strong acid with a strong base?

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64.

Why the heat of neutralisation is less than 57.1 kJ if either the acid or the base or both are weak?

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65. Define intensive property ? 
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66.

What does the symbol  ∆fH° denote?

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67. Write the thermochemical equation for combustion of benzene indicating the sign of ∆H.
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68.

What is the importance of fH°?

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69.

Will the heat evolved be same in the following two cases?
left parenthesis straight i right parenthesis space straight H subscript 2 left parenthesis straight g right parenthesis space plus space 1 half straight O subscript 2 left parenthesis straight g right parenthesis space rightwards arrow space space space straight H subscript 2 straight O left parenthesis straight g right parenthesis
left parenthesis ii right parenthesis space straight H subscript 2 left parenthesis straight g right parenthesis space plus space 1 half straight O subscript 2 left parenthesis straight g right parenthesis space space rightwards arrow space space space straight H subscript 2 straight O left parenthesis l right parenthesis
If not, in which case it will be greater and why?


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70.

Which of the following is/are exothermic and which is/are endothermic/
left parenthesis straight i right parenthesis space Ca left parenthesis straight g right parenthesis space space space space rightwards arrow space space space space Ca to the power of 2 plus end exponent left parenthesis straight g right parenthesis space plus space 2 straight e to the power of minus
left parenthesis ii right parenthesis space straight O left parenthesis straight g right parenthesis space plus space straight e to the power of minus space space space rightwards arrow space space space straight O to the power of minus left parenthesis straight g right parenthesis
left parenthesis iii right parenthesis space straight N to the power of 2 minus end exponent left parenthesis straight g right parenthesis space plus space straight e to the power of minus space rightwards arrow space space straight N to the power of 3 minus end exponent left parenthesis straight g right parenthesis

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