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ENTRANCE TEST – 2012 Multiple Questions and Answers.
| 17. | The angle between unhybridized p-orbital and three sp2 hybrid orbitals of each carbon atom in ether is: | ||
| A. | 120° | ||
| B. | 90° | ||
| C. | 109.5° | ||
| D. | 180° | ||
| 18. | In ‘H-F’ bond electronegativity difference is ‘1.9’. What is the type of this bond? | ||
| A. | Polar covalent bond | ||
| B. | Non-polar covalent bond | ||
| C. | Pi (π) bond | ||
| D. | Co-ordinate covalent bond | ||
| 19. | ‘ΔH’ will be given a negative sign in | ||
| A. | Exothermic reactions | ||
| B. | Decomposition reactions | ||
| C. | Dissociation reaction | ||
| D. | Endothermic reactions | ||
| 20. | Lattice energy of an ionic crystal is the enthalpy of | ||
| A. | Combustion | ||
| B. | Dissociation | ||
| C. | Dissolution | ||
| D. | Formation | ||
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