Gk Questions with AnswersChemistry General Knowledge Questions and Answers
| 17. | Which of the following is used to heat the fire clay pots in the manufacture of glass? | ||
|---|---|---|---|
| A. LPG gas | |||
| B. Producer gas | |||
| C. Water gas | |||
| D. Coal gas | |||
| Answer | ||
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| 18. | The ammonium compound, which is used as a "smelling salt" is | ||
|---|---|---|---|
| A. Ammonium nitrate | |||
| B. Ammonium carbonate | |||
| C. Ammonium chloride | |||
| D. Ammonium sulphate | |||
| Answer | ||
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| 19. | The pH of lemon juice is | ||
|---|---|---|---|
| A. 2.2 - 2.4 | |||
| B. 1.0 - 3.0 | |||
| C. 4.5 - 5.5 | |||
| D. 6.5 - 7.5 | |||
| Answer | ||
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| 20. | Oils are purified by | ||
|---|---|---|---|
| A. Crystallization | |||
| B. Vacuum distillation | |||
| C. Fractional distillation | |||
| D. Steam distillation | |||
| Answer | ||
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