Gk Questions with AnswersChemistry General Knowledge Questions and Answers
| 17. | The boiling point of iron is | ||
|---|---|---|---|
| A. 933 K | |||
| B. 2323 K | |||
| C. 2648 K | |||
| D. 2808 K | |||
| Answer | ||
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| 18. | One of the constituent of optical glass is | ||
|---|---|---|---|
| A. Red lead | |||
| B. Lead oxide | |||
| C. Alumina | |||
| D. Borax | |||
| Answer | ||
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| 19. | Name the chemical reagent to which glass does not have resistance. | ||
|---|---|---|---|
| A. Hydrochloric acid | |||
| B. Hydrofluoric acid | |||
| C. Hydrobromic acid | |||
| D. Hydroiodic acid | |||
| Answer | ||
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| 20. | Which of the following metal occurs in the native state? | ||
|---|---|---|---|
| A. Copper | |||
| B. Gold | |||
| C. Aluminium | |||
| D. Iron | |||
| Answer | ||
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