1. | \(OH^- \) | 2. | \(NH_3 \) |
3. | \(H_2O \) | 4. | \(BF_3 \) |
The conjugate bases of Bronsted acids H2O and HF are respectively:
1. H3O+ and H2F+, respectively.
2. OH- and H2F+, respectively.
3. H3O+ and F-, respectively.
4. OH- and F-, respectively.
Which of the following cannot act both as a Bronsted acid and as a Bronsted base?
1.
2.
3. HCl
4.
Boric acid is an acid because its molecule:
1. | contains replaceable H+ ion. |
2. | gives up a proton. |
3. | accepts OH- from water releasing proton into the solution. |
4. | combines with protons from water molecules. |
A Lewis base among the following is:
1. | BF3 | 2. | PF3 |
3. | CF4 | 4. | SiF4 |
Among the following, the correct order of acidity is:
1. HClO < HClO2 < HClO3 < HClO4
2. HClO2 < HClO < HClO3 < HClO4
3. HClO4 < HClO2 < HClO < HClO3
4. HClO3 < HClO4 < HClO2 < HClO
Which of these is least likely to act as Lewis base?
1. F–
2. BF3
3. PF3
4. CO
Which of the following molecular hydrides acts as a Lewis acid?
1.
2.
3.
4.
The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:
1.
2.
3.
4.