The dissociation constant of acetic acid Ka is 1.74 × 10-5 at 298 K. The pH of a solution of 0.1 M acetic acid is :
2.88
3.6
4.0
1.0
A.
2.88
For 0.1 M acetic acid or C = 0.1 mL-1
Ka = 1.74 × 10-5
pH = ?
According to Ostwald dilution formula,
[H+] =
=
=
pH = -log10 [H+]
= -log10
= 2.88
The pH of a solution of 0.1M acetic acid is 2.88.
0.365g of HCl gas was passed through 100 cm3 of 0.2 M NaOH solution. The pH of the resulting solution would be :
13
9
8
5
In the given reaction,
2X (g) + Y (g) 2Z (g) + 80 kcal
Which combination of pressure and temperature will give the highest yield of Z at equilibrium?
1000 atm and 200°C
500 atm and 500°C
1000 atm and 100°C
500 atm and 100°C
The presence of Ag+ ion increases the solubility of alkenes due to the formation of :
d-dσ bonding
pσ-p bonding
p bonding
None of the above
Which of the following compounds would have the smallest value for pKa?
CHF2CH2CH2COOH
CH3CH2CF2COOH
CH2FCHFCH2COOH
CH3CF2CH2COOH
Each B - H - B bridge in B2H6 is formed by the sharing of:
2 electrons
4 electrons
1 electron
3 electrons
Which carbon is more electronegative ?
sp3 - hybridised carbon
sp - hybridised carbon
sp2 - hybridised carbon
Always same irrespective of its hybrid state
In Lassaigne's test, a blue colour is obtained if the organic compound contains nitrogen. The blue colour is due to
K4[Fe(CN)6]
Fe4[Fe(CN)6]3
Na3[Fe(CN)6]
Cu2[Fe(CN)6]