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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
The number of endothermic process/es from the following is

$A.$ $I _2( g ) \rightarrow 2 I ( g )$

$B.$ $HCl ( g ) \rightarrow H ( g )+ Cl ( g )$

$C.$ $H _2 O ( l ) \rightarrow H _2 O ( g )$

$D.$ $C ( s )+ O _2( g ) \rightarrow CO _2( g )$

$E.$ Dissolution of ammonium chloride in water

  • A
    $3$
  • B
    $2$
  • C
    $4$
  • D
    $1$
✓

Answer

$A \rightarrow$ Endothermic (Atomisation)

$B \rightarrow$ Endothermic (Atomisation)

$C \rightarrow$ Endothermic (Vapourisation)

$D \rightarrow$ Exothermic (Combustion)

$E \rightarrow$ Endothermic (Dissolution)

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