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)
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.
4
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.