The correct order of the boiling points of \(\mathrm{H}_2 \mathrm{O}, \mathrm{HF}, \text{ and} \ \mathrm{NH}_3\) is:
1. HF > H2O > NH3
2. H2O > HF > NH3
3. NH3 > HF > H2O
4. NH3 > H2O > HF
In ion, the formal charge on the oxygen atom of the P-O bond is :
1. | +1 | 2. | –1 |
3. | –0.75 | 4. | +0.75 |
In ion, the number of bond pairs and lone pairs of electrons exhibited by nitrogen atom is:
1. 2, 2
2. 3, 1
3. 1, 3
4. 4, 0
The number of bonds and bonds in the following structure is :
1. | 6, 19 | 2. | 4, 20 |
3. | 5, 19 | 4. | 5, 20 |
The species doesn't have unpaired electrons is:
1. | \(N^+_2\) | 2. | \(O_2\) |
3. | \(O^{2-}_2\) | 4. | \(B_2\) |
In which of the following molecule/ion all the bonds are not equal?
1. | 2. | ||
3. | 4. |
Hydrogen bond will be strongest in :
1. HCl
2. H2O
3. HI
4. H2S
If the electronic configuration of an element is , the four electrons that participate in the chemical bond formation will be from :
1. | 2. | ||
3. | 4. |
The correct bond angle for \(\mathrm{sp}^2\) hybridization is:
1. \(90^\circ\)
2. \(120^\circ\)
3. \(180^\circ\)
4. \(109^\circ\)