Gk Questions with AnswersChemistry
DIRECTIONS : Questions based on Chemistry.
| 51. | A polymeric substance used to make parachute is | ||
|---|---|---|---|
| A. Rayon | |||
| B. Viscose | |||
| C. Cotton | |||
| D. Terylene | |||
| 52. | Carbon occurs in nature in the purest form as | ||
|---|---|---|---|
| A. Diamond | |||
| B. Graphite | |||
| C. Carbon black | |||
| D. Coal | |||
| 53. | Which of the following substance is highly plastic? | ||
|---|---|---|---|
| A. Quartz | |||
| B. Mica | |||
| C. Clay | |||
| D. Granite | |||
| 54. | Which one among the following is used as a moderator in nuclear reactors? | ||
|---|---|---|---|
| A. Ozone | |||
| B. Heavy hydrogen | |||
| C. Heavy water | |||
| D. Hydrogen peroxide | |||
| 55. | Who discovered radioactivity? | ||
|---|---|---|---|
| A. Marie Curie | |||
| B. Roentgen | |||
| C. John Dalton | |||
| D. Henri Becquerel | |||