| 1 |
Basicity of ortho phosphoric acid is. |
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| 2 |
Laughing gas is chemically |
- A. NO
- B. NO<sub>2</sub>
- C. N<sub>2</sub>O
- D. N<sub>4</sub>O<sub>4</sub>
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| 3 |
PCl3 reacts with water to form |
- A. PH3
- B. POCl3
- C. H3PO4
- D. H3PO5
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| 4 |
Out of all the elements of group VA, the highest ionization energy is possessed by |
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| 5 |
NH4NO3 on heating at 200 <sup>o</sup>C changes to |
- A. N2O
- B. NO
- C. NO2
- D. N2O4
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| 6 |
Which one is metaphosphoric acid |
- A. HPO3
- B. H3PO3
- C. H3PO4
- D. H4P2O7
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| 7 |
Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element |
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| 8 |
Which catalyst is used in contact process. |
- A. Fe2O3
- B. V2O5
- C. SO3
- D. Ag2O
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| 9 |
The reaction between concentrated H2SO4 and glucose give carbon and water. In this reaction H2SO4 acts as. |
- A. An acid
- B. An oxidising agent
- C. Dehydrating agent
- D. A reducing agent
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| 10 |
The reaction between Cu and conc. H2SO4 produces |
- A. SO3
- B. SO2
- C. H2
- D. Cu + ions
|