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An endothermic reaction is allowed to oc...

An endothermic reaction is allowed to occur very rapidly in the air. The temperature of the surrounding air

A

remains constant

B

decreases

C

increases

D

may increase or decrease

Text Solution

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The correct Answer is:
B
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Wolff rearrangement When alpha -Diazoketones are photo-irradiated or heated at high temperature or reacted with silver oxide or silver salts at room temperature, they loose nitrogen and rearrange to form ketene. The ketenes reacts rapidly with water, alcohol and amines. Therefore, the reactions called Wolff-rearrangement. Major product of the reaction is :

Wolff rearrangement When alpha -Diazoketones are photo-irradiated or heated at high temperature or reacted with silver oxide or silver salts at room temperature, they loose nitrogen and rearrange to form ketene. The ketenes reacts rapidly with water, alcohol and amines. Therefore, the reactions called Wolff-rearrangement. Product (A) is :

Wolff rearrangement When alpha -Diazoketones are photo-irradiated or heated at high temperature or reacted with silver oxide or silver salts at room temperature, they loose nitrogen and rearrange to form ketene. The ketenes reacts rapidly with water, alcohol and amines. Therefore, the reactions called Wolff-rearrangement. , Product (A) is :

MODERN PUBLICATION-THERMODYNAMICS-Multiple Choice Questions (Level-II)
  1. For which of the following reactions, Delta H is greater than Delta U ...

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  2. A sample of gas changes from p(1), V(1) and p(2). V(2) and T(2) by one...

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  3. An endothermic reaction is allowed to occur very rapidly in the air. T...

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  4. Under which of the following conditions is the relation Delta H = Delt...

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  5. The enthalpy change for the process : C(s) rarr C(g) corresponding...

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  6. For the reversible vaporisation of water at 373 K and 1 atmosphere pre...

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  7. Calculate the heat required to make 6.4 kg of CaC(2) from CaO(s) and C...

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  8. Four grams of helium is expanded from 1 atm to one-tenth of its origii...

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  9. The entropy change of the conversion of 1 mol of alpha- tin (at 13^(@)...

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  10. The following data is known about the melting of a compoun AB. Delta H...

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  11. For a reaction, X + Y rarr Z there is no entropy charge. Enthaply ...

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  12. The difference between heats of reaction at constant pressure and cons...

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  13. Given : H(2)(g) + (1)/(2) O(2)(g) = H(2)O(g) + q(1) H(2)(g) + (1)/...

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  14. If CH(3)COOH + OH^(-) rarr CH(3)COO^(-) + H(2)O + x kJ H^(+) + OH^(-...

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  15. The heat of neutralisation of HCl and NaOH is 57.3 kJ "mol"^(-1). The ...

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  16. Given that O(g) + e^(-) rarr O^(-)(g) Delta H = - 142 kJ mol^(-1) O(...

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  17. Equal volumes of 1 M HCl and H(2)SO(4) are neutralised by dil NaOH sol...

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  18. For an ideal gas, the Joule Thomson co-efficient is equal to

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  19. The enthalpies of combustion of some fuels are given below. Which of t...

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  20. Which of the following statements/relationships is not correct ?

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