| 1. | of benzene and acetylene |
A. The molecular formula and the proportional formula are the same | |
B. molecular formulas are different but proportional formulas are the same | |
C. Same molecular formula but different proportional formula | |
D. no one is right |
| 2. | The empirical formula of a compound is CH₂O and molecular weight is 60. The molecular formula of its compound will be – |
A. C₂H₄O | |
B. C₂H₄O₂ | |
C. CH₂ₒ | |
D. CHOOSE |
| 3. | The conversion of a solid substance directly into a vapor state without changing into a liquid is called |
A. by distillation | |
B. boiling | |
C. Sublimation | |
D. compaction |
| 4. | The slow decomposition of organic compounds by micro-organisms is called |
A. chlorination | |
B. polymerization | |
C. Pasteurization | |
D. Fermentation |
| 5. | The process of converting complex higher hydrocarbons of less volatile high boiling point into simpler hydrocarbons of lower boiling point by heating is called |
A. polymerization | |
B. compaction | |
C. Bhanjan | |
D. Fermentation |
| 6. | The process of vaporization of solid camphor is called |
A. evaporation | |
B. Freezing | |
C. to thaw | |
D. Sublimation |
| 7. | Souring of milk into curd is an example of – |
A. Saponification | |
B. Puyan | |
C. Fermentation | |
D. esterification |
| 8. | An example of fermentation is – |
A. sour milk | |
B. souring of wet dough | |
C. distillate | |
D. All of the above |
| 9. | Which is a false statement regarding polymerization? |
A. it is a reversible reaction | |
B. different types of molecules combine with each other | |
C. The molecular mass of a polymeric compound is a whole multiple of the molecular mass of the starting compound. | |
D. Carbon atoms do not form new bonds in this |
| 10. | An example of pluralization is – |
A. conversion of acetylene to benzene | |
B. formaldihyde से trioxane | |
C. ecetealdihyde से paraldihyde | |
D. All of the above |