CBSE
Which of the following is a Lewis base ?
NaOH
NH3
BCl3
All of these
Which will make basic buffer?
100mL of 0.1 M CH3COOH + 100mL of 0.1M NaOh
100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH
100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
At 900C , pure water has [H+]=10-6 M , if 100 mL of 0.2 M HCl is added to 200mL of 0.1 M KOH at 90°C then pH of the resulting solution will be:
5
6
7
4
pH of a saturated solution of Ca(OH)2 is 9. The solubility product(Ksp) of Ca(OH)2 is:
0.25 × 10-10
0.5 × 10-15
0.125 × 10-15
0.5 × 10-10
Which of the following dissolves in hot conc. NaOH solution?
Fe
Zn
Cn
Ag
KMnO4 can be prepared from K2MnO4 as per reaction
The reaction can go to completion by removing OH- ions by adding
HCl
KOH
CO2
SO2
Conjugate base for BrÖnsted acids H2O and HF are :
H3O+ and F-, respectively
OH- and F-, respectively
H3O+ and H2F+, respectively
OH- and H2F+, respectively