TRB MODEL QUESTIONS FOR CHEMISTRY
TRB Model Questions
26. | Crude petroleum is refined by |
---|---|
|
27. | Vapour density of pure ozone is |
---|---|
|
28. | Which of the following is not a homogenous mixture? |
---|---|
|
29. | The valency of bicarbonate ion is |
---|---|
|
30. | The valency of sulphate ion is |
---|---|
|