| 1 |
NH4NO3 on heating at 200 <sup>o</sup>C changes to |
- A. N2O
- B. NO
- C. NO2
- D. N2O4
|
| 2 |
The element which is present in earth crust about 50% is |
- A. Oxygen
- B. sulphur
- C. Carbon
- D. Nitrogen
|
| 3 |
Which one of the following group of Periodic table called chalcogen family. |
- A. Group III A
- B. Group VA
- C. Group VI A
- D. Group VII A
|
| 4 |
Which of the following is a reddish brown gas |
- A. N<sub>2</sub>O<sub>3</sub>
- B. NO<sub>2</sub>
- C. N<sub>2</sub>O<sub>3</sub>
- D. N<sub>2</sub>O<sub>5</sub>
|
| 5 |
The most electronegative element of group V-A is |
|
| 6 |
Which form of phosphorus is more stable. |
- A. White
- B. Red
- C. Black
- D. Both a and b
|
| 7 |
Maximum number of unpaired electrons is in |
- A. O<sub>2</sub>
- B. O<sub>2</sub><sup>+</sup>
- C. O<sub>2</sub><sup>-</sup>
- D. O<sub>2</sub><sup>2-</sup>
|
| 8 |
NO2 can be obtained by heating. |
- A. NaNO3
- B. KNO3
- C. Pb(NO3)2
- D. NH3NO3
|
| 9 |
Gold dissolves in "Aqua Regia" due to formation of Halide. Point out correct halide |
- A. AuF<sub>3</sub>
- B. AuCl<sub>3</sub>
- C. AuBr<sub>3</sub>
- D. AuI<sub>3</sub>
|
| 10 |
Out of the elements of group VA, the highest energy is possessed by |
|