MCQ
Hess's law is related to:
  • A
    Change in heat during a reaction
  • B
    Rates of reaction
  • C
    Equilibrium constant
  • D
    Influence of pressure on volume of a gas

Answer

  1. Change in heat during a reaction

Explanation:

Hess's law is related to change in heat during a reaction.

It states that the total change in heat enthalpy during the complete course of reaction is same whether the change is brought in one step or in several steps by one method or other method.

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Similar questions

The order of reactivity of following compounds :

$(I)$ $\phi -CH_3$

$(II)$ $\phi -CH_2-CH_3$

$(III)$ $\phi -CH(CH_3)_2$

$(IV)$ $\phi-C(CH_3)_3$

towards electrophilic substitution will be - [where $\phi =C_6H_5$]

Match list $-I$ with list $-II$ and then select the correct answer from the codes given below that list

                                  List $-I$

$(A){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_6} + CO + HCl\,\xrightarrow{{AlC{l_3}}}\,{C_6}{H_5}CHO$

$(B){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_5} + C{H_3}$ $\xrightarrow{{Cr{O_2}C{l_2}}}\,{C_6}{H_5}CHO$

$(C){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_5}C{H_2}Br\, + \,C{H_3}Br$ $\xrightarrow{{Na/ether}}\,{C_6}{H_5}C{H_2}C{H_3}$

$(D){\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {C_6}{H_6}\, + \,{(C{H_3})_2}C = C{H_2}$ $\xrightarrow{{{H_2}S{O_4}}}\,{C_6}{H_5}C{(C{H_3})_3}$

                                 List $-II$
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