PG TRB Chemistry Previous Year Question Papers
| 5. |
Mention the chemical which is a food preservative? |
| |
- A. Sodium benzoate
- B. Sodium thiosulphate
- C. Sodium bicarbonate
- D. Sodium carbonate
|
| 6. |
When methyl orange is added to hydrochloric acid, it takes the colour |
| |
- A. Pink
- B. Red
- C. Blue
- D. Yellow
|
| 7. |
What is the black board chalk made of? |
| |
- A. Calcium chloride
- B. Petroleum waste
- C. Soft and stickly clay
- D. Lime
|
| 8. |
A common nitrogenous fertilizer is |
| |
- A. Potassium chloride
- B. Triple phosphate
- C. Super phosphate
- D. Urea
|
