MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Is inorganic benzene reactive than Benzene? |
| A. | Yes |
| B. | No |
| C. | Maybe |
| D. | Cannot say |
| Answer» B. No | |
| 2. |
In order to prepare borazine, we need by diborane and Ammonia in the ratio ____________ |
| A. | 5:9 |
| B. | 1:2 |
| C. | 22:23 |
| D. | 3:4 |
| Answer» C. 22:23 | |
| 3. |
What is inorganic benzene? |
| A. | Boron |
| B. | Borax |
| C. | Boroline |
| D. | Borazole |
| Answer» E. | |
| 4. |
Which of the following salt has an outcome of blue colour as a result of a borax bead test? |
| A. | Nickel sulphate |
| B. | Cobalt sulphate |
| C. | Ferrous sulphate |
| D. | Chromium sulphate |
| Answer» C. Ferrous sulphate | |
| 5. |
What is the chemical formula of the mineral colemanite? |
| A. | CaB<sub>6</sub>O.5H<sub>2</sub>O |
| B. | Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O |
| C. | Ca<sub>2</sub>B<sub>6</sub>O.5H<sub>2</sub>O |
| D. | Na<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O |
| Answer» D. Na<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O | |
| 6. |
Orthoboric acid is a weak monobasic Lewis acid. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
What do we get upon heating or orthoboric acid at last? |
| A. | Metaboric acid |
| B. | Tetraboric acid |
| C. | Borax |
| D. | Boron trioxide |
| Answer» E. | |
| 8. |
Tincal is ____________ |
| A. | alum |
| B. | aluminium |
| C. | boric acid |
| D. | borax |
| Answer» E. | |
| 9. |
What is the colour of borax bead in the basic radical chromium test? |
| A. | White |
| B. | Brown white |
| C. | Green |
| D. | Blue |
| Answer» D. Blue | |
| 10. |
The chemical name of borax is a ____________ |
| A. | sulphur tetraborate decahydrate |
| B. | sodium tetraborate decahydrate |
| C. | sodium pentaborate nano hydrate |
| D. | sodium hexa borate hexahydrate |
| Answer» C. sodium pentaborate nano hydrate | |
| 11. |
Does Boron occur in a free state? |
| A. | No |
| B. | Yes |
| C. | Sometimes |
| D. | May not be |
| Answer» B. Yes | |
| 12. |
The complete combustion of diborane is ____________ |
| A. | endothermic |
| B. | exothermic |
| C. | there is no change in energy |
| D. | depends on the reaction |
| Answer» C. there is no change in energy | |
| 13. |
Diborane is a ____________ |
| A. | monomer |
| B. | dimer |
| C. | trimer |
| D. | polymer |
| Answer» C. trimer | |