Gk Questions with AnswersChemistry Quiz Questions and Answers
| 21. | The colouring agent used in the preparation of brown coloured glass is | ||
|---|---|---|---|
| A. Chromic oxide | |||
| B. Cobalt oxide | |||
| C. Manganese dioxide | |||
| D. Ferric oxide | |||
| Answer | ||
|
| 22. | Which of the following is used in endoscopes? | ||
|---|---|---|---|
| A. Optical fibre | |||
| B. Safety glass | |||
| C. Glass wool | |||
| D. Flint glass | |||
| Answer | ||
|
| 23. | A pungent smell often present near the urinals is due to | ||
|---|---|---|---|
| A. Chlorine | |||
| B. Ammonia | |||
| C. Sulphur dioxide | |||
| D. Urea | |||
| Answer | ||
|
| 24. | Blood cells do not shrink in blood because blood is | ||
|---|---|---|---|
| A. Equimolar | |||
| B. Isotonic | |||
| C. Hypotonic | |||
| D. Hypertonic | |||
| Answer | ||
|