| 1 |
NO2 can be obtained by heating. |
- A. NaNO3
- B. KNO3
- C. Pb(NO3)2
- D. NH3NO3
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| 2 |
Which raw material is used for manufacture eof HNO3 by Birkland eyed process |
- A. NH3 and CO2
- B. Air
- C. Air and gypsum
- D. Lime stone and urea
|
| 3 |
Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element |
|
| 4 |
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
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| 5 |
The element which is present in earth crust about 50% is |
- A. Oxygen
- B. sulphur
- C. Carbon
- D. Nitrogen
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| 6 |
The brown gas formed when metal reduces HNO3 is |
- A. N2O5
- B. N2O3
- C. NO2
- D. NO
|
| 7 |
In pyrite burner, the gas produced is. |
- A. SO3
- B. SO2
- C. CO2
- D. NO
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| 8 |
Which one is metaphosphoric acid |
- A. HPO3
- B. H3PO3
- C. H3PO4
- D. H4P2O7
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| 9 |
P2O5 is usually used as |
- A. Drying agent only
- B. Reducing agent
- C. Both drying and reducing agent
- D. Both drying agent and oxidizing agent.
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| 10 |
Most likely product formed when formic acid is dehydrated in the presence of conc. H2SO4 is. |
- A. CO2 and H2O
- B. CO, CO2 and H2O
- C. CO2 and H2
- D. CO and H2O
|