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
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
Which one of the following oxides is amphoteric ?
ZnO
MgO
CaO
CO2
A.
ZnO
An amphoteric compound or metal oxide or hydroxide is able to react both as base and as an acid. Therefore, among the given options, ZnO is an amphoteric molecule.
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]