| 1 |
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>
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| 2 |
Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element |
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| 3 |
The oxidation of NO in air produces |
- 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>4</sub>
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| 4 |
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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| 5 |
Which of the following gives acidic oxide |
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| 6 |
Which catalyst is used in contact process. |
- A. Fe2O3
- B. V2O5
- C. SO3
- D. Ag2O
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| 7 |
The most electronegative element of group V-A is |
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| 8 |
The brown gas formed, when metal reduce HNO<sub>3</sub> |
- A. NO
- B. NO<sub>2</sub>
- C. N<sub>2</sub>O<sub>3</sub>
- D. N<sub>2</sub>O<sub>5</sub>
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| 9 |
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>
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| 10 |
In group V-A elements the most electronegative elements is |
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