NH4Cl
Reason –
The bond formed between the nitrogen atom in ammonia and the chloride ion is a coordinate bond.

NH4Cl
Reason –
The bond formed between the nitrogen atom in ammonia and the chloride ion is a coordinate bond.

| Element | Element | Type of bond likely in molecule of | Formula of compound |
|---|---|---|---|
| A: At. no. = 20 | B: At no. = 8 | A and B | |
| A: At no. = 20 | C: At no. = 17 | A and C | |
| D: At. no. = 9 | D: At. no. = 9 | D and D | |
| E: At. no. = 12 | F: At. no. = 16 | E and F | |
| G: At. no. = 1 | F: At. no. = 16 | G and F |