Reaction BaO2(g) $$\rightleftharpoons$$ BaO(s) + O2(g); $$\Delta $$H = +ve. In equilibrium condition, pressure of O2 depends on
A
increase mass of BaO2
B
increase mass of BaO
C
increase temperature on equilibrium
D
increase mass of BaO2 and BaO both.
Explanation
For the reaction
BaO2(g) $$\rightleftharpoons$$ BaO(s) + O2(g); H = +ve.
At equilibrium Kp = PO2
[For solid and liquids concentration term is taken
as unity]
Hence, the value of equilibrium constant
depends only upon partial pressure of O2.
Further on increasing temperature formation of
O2 increases as this is an endothermic reaction.
2
AIPMT 2002
MCQ (Single Correct Answer)
Which has highest pH?
A
CH3COOK
B
Na2CO3
C
NH4Cl
D
NaNO3
Explanation
Na2CO3 is a salt of weak acid H2CO3 and
strong base NaOH, therefore, its aqueous
solution will be basic hence has pH more than 7.
3
AIPMT 2002
MCQ (Single Correct Answer)
Solubility of MX2 type electrolytes is 0.5 $$ \times $$ 10$$-$$4 mole/lit., then find out Ksp of electrolytes.
Correct relation between dissociation constants of a dibasic acid is
A
Ka1 = Ka2
B
Ka1 > Ka2
C
Ka1 < Ka2
D
Ka1 = $${1 \over {{K_{{a_2}}}}}$$
Explanation
In polyprotic acids the loss of second
proton occurs much less readily than the first.
Usually the Ka values for successive loss of
protons from these acids differ by at least a factor
of 10–3.
$$ \therefore $$ Ka1 > Ka2
Questions Asked from Equilibrium
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