Download App

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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Which of the following is correct when decrease in entropy has been taken place?
  • A
    Temperature of a crystalline solid is raised from $0\, K$ to $115\, K.$
  • ✓
    Crystallisation of a liquid into a solid
  • C
    $2NaHCO_3(s) \to Na_2CO_3(s) + CO_2(g) + H_2O(g)$
  • D
    $H_2(g) \to 2H(g)$
✓

Answer

Correct option: B.
Crystallisation of a liquid into a solid
b

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

Explore more

More "M.C.Q (1 Marks)" from 5. Thermodynamics and thermochemistry→5. Thermodynamics and thermochemistry — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The formation of $S{O_3}$ takes place according to the following reaction, $2S{O_2} + {O_2}$ $\rightleftharpoons$ $2S{O_3}$; $\Delta H = - 45.2\;k\,cal$ The formation of $S{O_3}$ is favoured by
→
The partial pressures of $C{H_3}OH,\,CO$ and ${H_2}$ in the equilibrium mixture for the reaction $CO + 2{H_2}$ $\rightleftharpoons$ $CH_3OH$ at $427\,^oC$ are $2.0$, $1.0$ and $0.1$ $atm$ respectively. The value of ${K_P}$ for the decomposition of $C{H_3}OH$ to $CO$ and ${H_2}$ is
→
Which of the following order is incorrect
→
$0.01$ moles of a weak acid $HA \left( K _{ a }=2.0 \times 10^{-6}\right)$ is dissolved in $1.0\, L$ of $0.1\, M\, HCl$ solution. The degree of dissociation of $HA$ is ............. $\times 10^{-5}$

(Round off to the Nearest Integer).

[Neglect volume change on adding $HA$. Assume degree of dissociation $<< 1]$

→
What metals combine with non-metals, the metal atom tends to
→
$PbCl_2$ is dissolved in water to make its saturated solution. What will be the freezing point of this solution.

Given : $K_f (H_2O)$ = $2\ K\ kg\ mole^{-1}$, $K_{sp} (PbCl_2)$ = $4 × 10^{-6}$

(Assume molarity to be equal to molality) .....$^oC$

→
How many secondary carbon and hydrogen atoms are present in the molecule given below are spectively ?
→
Which of the following is the correct order of size of the given species:
→
$IUPAC$ name of the following compound $C{H_3} - C{H_2} - \mathop {CH - C{H_2}}\limits^{\mathop {O\,\,\,\,\,\,\,}\limits_{/\,\,\,\,\,\backslash \,\,\,\,\,\,\,} } $ is
→
The volume $(\text { in } \mathrm{mL})$ of $0.125\; \mathrm{M}\; \mathrm{AgNO}_{3}$ required to quantitatively precipitate chloride ions in $0.3\; \mathrm{g}$ of $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3}$ is $^{\mathrm{M}}\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3}=267.46 \;\mathrm{g} / \mathrm{mol}$ $\mathrm{M}_{\mathrm{AgNO}_{3}}=169.87 \;\mathrm{g} / \mathrm{mol}$
→