MCQ
Bond-breaking is an _________________process.
  • A
    Endothermic
  • B
    Exothermic
  • C
    Neither exothermic nor endothermic.
  • D
    Either exothermic or endothermic.

Answer

  1. Neither exothermic nor endothermic.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Excess of $KI $ reacts with $CuS{O_4}$ solution and then $N{a_2}{S_2}{O_3}$ solution is added to it. Which of the statements is incorrect for this reaction
Amount of $PCl_5$ (in moles) need to be added to one litre vessel at $250\,^oC$ in order to obtain $0.1\,moles$ of $Cl_2$ for the given change is

$PC{l_5}\, \rightleftharpoons \,PC{l_3}\, + \,C{l_2}\,;\,{K_C} = \,0.0414\,mol\,{L^{ - 1}}$

Calculate de-Broglie wavelength of an electron travelling at $ 1\%$  of the speed of light
Consider the reaction at $300\,K$

${C_6}{H_5}(l)\, + \,\frac{{15}}{2}\,{O_2}(g)\, \to \,6\,C{O_2}(g)\, + \,3{H_2}O\,(l);$    $\Delta H = \,-\,3271\,kJ$

What is $\Delta U$ for the combustion of $1.5\,mole$ of benzene at $27\,^oC$ ? .....$kJ$

For a reaction, $A \rightleftharpoons P$, the plots of $[ A ]$ and $[ P ]$ with time at temperatures $T _1$ and $T _2$ are given below.

If $T _2> T _1$, the correct statement(s) is (are)

(Assume $\Delta H ^{\ominus}$ and $\Delta S ^{\ominus}$ are independent of temperature and ratio of $\ln K$ at $T _1$ to $\ln K$ at $T_2$ is greater than $T_2 / T_1$. Here $H, S, G$ and $K$ are enthalpy, entropy, Gibbs energy and equillibrium constant, respectively.)

$(A)$ $\Delta H ^{\ominus}<0, \Delta S ^{\ominus}<0$  $(B)$ $\Delta G ^{\ominus}<0, \Delta H ^{\ominus}>0$  $(C)$ $\Delta G ^{\ominus}<0, \Delta S ^{\ominus}<0$  $(D)$ $\Delta G ^{\ominus}<0, \Delta S ^{\ominus}>0$

Linear structure is assumed by :
$(I) \,NCO^-$             $(II)\, CS_2$          $(III)\, \overset{+}{\mathop{N}}{{O}_{2}}$       $(IV)$ Solid $BeH_2$
The compound that has the highest ionic character associated with the $X - Cl$  bond is
First three ionisation energies (in $kJ/mol$) of three representative elements are  given below

Element $IE_1$ $IE_2$ $IE_3$
$P$ $495.8$ $4562$ $6910$
$Q$ $737.7$ $1451$ $7733$
$R$ $577.5$ $1817$ $2745$

Then incorrect option is

Of the following sets which one does NOT contain isoelectronic species
The correct order of $I.E_2.$ is