CBSE
pH of a solution can be expressed as :
-loge [H+]
-log10 [H+]
loge [H+]
log10[H+]
At equilibrium which is correct?
G = 0
S = 0
H = 0
= 0
Which of the following is most basic?
Al(OH)3
Cr(OH)3
La(OH)3
Fe(OH)3
Which has the highest pH?
CH3COOK
Na2CO3
NH4Cl
NaNO3
pKa increases in benzoic acid when substituent "x" is bonded at para-position, then "x" is
-COOH
-NO2
-CN
-OCH3
K2Cr2O7 in acidic medium converts into
Cr2+
Cr3+
Cr4+
Cr5+
If the solubility of PbCl2 at 25°C is 6.3 x 10-2 mol/L , its solubility product is :
1 x 10-6
1 x 10-3
1.1 x 10-6
1.1 x 10-5
Which one of the following aqueous solutions of salts has the lowest pH value ?
CH3COONa
NaCl
NH4OOCCH3
NH4Cl
At 60° and 1 atm, N2O4 is 50% dissociated into NO2 then KP is
1.33 atm
2 atm
2.67 atm
3 atm
for following reaction will be .
RT