| 1 |
Which allotrope of phosphorus has layers like graphite. |
- A. white phosphorus
- B. Red phosphorus
- C. Black Phosphorus
- D. Amorphous phosphorus
|
| 2 |
PCl3 reacts with water to form |
- A. PH3
- B. POCl3
- C. H3PO4
- D. H3PO5
|
| 3 |
Which one of the following does not react with dilute sulphuric acid. |
- A. Mg (OH)2
- B. Mg
- C. MgO
- D. Mg(NO3)2
|
| 4 |
Which statement is incorrect about H2SO4 |
- A. Dehydration agent
- B. dibasic acid
- C. Oxidizing agent
- D. Reducing agent
|
| 5 |
Bone ash contain calcium phosphate |
- A. 40%
- B. 50%
- C. 70%
- D. 80%
|
| 6 |
Out of the elements of group VA, the highest energy is possessed by |
|
| 7 |
In which substance phosphorus is not present. |
- A. Yolk of egg
- B. Bones
- C. Apatite
- D. Galena
|
| 8 |
Which element does not have allotropic form |
- A. Nitrogen
- B. Phosphorous
- C. Arsenic
- D. Antimony
|
| 9 |
Which catalyst is used in contact process. |
- A. Fe2O3
- B. V2O5
- C. SO3
- D. Ag2O
|
| 10 |
Lowest oxidation state of nitrogen is present in. |
- A. NH3
- B. NO2
- C. NO
- D. HNO3
|