MCQ
In which case change in entropy is negative ?
- AEvaporation of water
- BExpansion of a gas at constant temperature
- CSublimation of solid to gas
- ✓$2H(g)\rightarrow H_2(g)$
✓
Answer
Correct option: D.
$2H(g)\rightarrow H_2(g)$
d
$2H(g)\rightarrow H_2(g)$
$2H(g)\rightarrow H_2(g)$
Due to bond formation, entropy decreases
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
→→→→→→
Correct order of reactivity towards $E.S.R.$ for following compound is
→At a certain temperature the equilibrium constant $K_c$ is $0.25$ for the reaction
→$A_2(g) + B_2(g) \rightleftharpoons C_2(g) + D_2(g)$
If we take $1$ mole of each of the four gases in a $10$ litre container, what would be equilibrium concentration of $A_2(g)$ ?
Based upon an understanding of product stability, predict the product formed when the following dianion reacts with one equivalent of acid
In the thermite process the reducing agent is
In which of the following pairs, both the species have the same hybridisation ?
$(I)\, SF_4 ,XeF_4\,\,\, (II)\, I^-_3,XeF_2\,\,\, (Ill)\, ICl^+_4 , SiCl_4\,\,\,(IV)\, ClO^-_3,PO^{3-}_4$
→$(I)\, SF_4 ,XeF_4\,\,\, (II)\, I^-_3,XeF_2\,\,\, (Ill)\, ICl^+_4 , SiCl_4\,\,\,(IV)\, ClO^-_3,PO^{3-}_4$
For complete combustion of $10\, L$ of alkane volume of oxygen required is $50\, L$ Then identify alkane
→A mixture of camphor and benzoic acid can be separated by
The entropy of crystalline substances at absolute zero going by the third law of thermodynamics should be taken as
A chemical reaction cannot occur at all if