Gk Questions with AnswersChemistry Gk Questions and Answers
| 37. | What is a mixture of potassium nitrate, powdered charcoal and sulphur called? | ||
|---|---|---|---|
| A. Cement | |||
| B. Glass | |||
| C. Paint | |||
| D. Gun powder | |||
| Answer | ||
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| 38. | Vinegar is an aqueous solution of | ||
|---|---|---|---|
| A. Acetic acid | |||
| B. Citric acid | |||
| C. Oxalic acid | |||
| D. Hydrochloric acid | |||
| Answer | ||
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| 39. | Which one of the following is not present in cement? | ||
|---|---|---|---|
| A. Alumina | |||
| B. Clay | |||
| C. Alum | |||
| D. Gypsum | |||
| Answer | ||
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| 40. | Which of the following has highest frequency? | ||
|---|---|---|---|
| A. Ultra violet rays | |||
| B. Light rays | |||
| C. Cosmic rays | |||
| D. X rays | |||
| Answer | ||
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