1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
In which case change in entropy is negative?
A
Sublimation of solid to gas
B
2H(g) $$ \to $$ H2(g)
C
Evaporation of water
D
Expansion of a gas at temperature
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Conjugate base for Bronsted acids H2O and HF are :
A
OH and F , respectively
B
H3O+ and H2F+ , respectively
C
OH and H2F+ , respectively
D
H3O+ and F , respectively
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?
A
H2Po < H2Te < H2Se < H2S < H2O
B
H2Se < H2Te < H2Po < H2O < H2S
C
H2S < H2O < H2Se < H2Te < H2Po
D
H2O < H2S < H2Se < H2Te < H2Po
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
For the cell reaction
2Fe3+(aq) + 2I (aq) $$ \to $$ 2Fe2+(aq) + I2(aq)
$${E_{cell}^\Theta }$$ = 0.24 V at 298 K. The standard Gibbs energy ($$\Delta $$rGo) of the cell reaction is :
[Given that Faraday constant F = 96500 C mol–1]
A
46.32 kJ mol–1
B
23.16 kJ mol–1
C
–46.32 kJ mol–1
D
–23.16 kJ mol–1