| 1 |
In which system all the three axes are of equal length and all angles are at right angle. |
- A. Cubic
- B. Tetragonal
- C. Orthorhombic
- D. Hexagonal
|
| 2 |
The boiling point of glycerin at one atm is. |
- A. 280 <sup>o</sup>C
- B. 290 <sup>o</sup>C
- C. 100 <sup>o</sup>C
- D. 110 <sup>o</sup>C
|
| 3 |
The lightest value of lattice energy is for which one of these ionic compounds. |
- A. NaI
- B. NaF
- C. NaBr
- D. NaCl
|
| 4 |
Exceptionally low acidic strength of HF is due to. |
- A. Strong polar bond between H and F
- B. Smaller size of fluorine
- C. Strong hydrogen bonding
- D. electronegativity of fluorine
|
| 5 |
The molecules of CO<sub>2</sub>in dry ice form the |
- A. Ionic crystal
- B. Covalent crystals
- C. Molecular crystals
- D. Any type of crystals
|
| 6 |
Which liquid has low boiling point with. |
- A. Less intermolecular force and higher V.P
- B. Greater intermolecular forces and low V.P
- C. Bigger size and greater polarizability
- D. High hydrogen bonding in it
|
| 7 |
When water freezes at 0 <sup>o</sup>C, its density decrease due to. |
- A. Cubic structure of ice
- B. Empty spaces present in the structure of ice
- C. Change of bond lengths
- D. Change of bond angles
|
| 8 |
The molecule of CO2 in dry ice form the. |
- A. Ionic crystals
- B. Covalent crystals
- C. Molecular crystals
- D. Any type of crystals
|
| 9 |
Select the correct answer out of the following alternative suggestions London dispersion forces are the only forces present among the. |
- A. Molecules of water in liquid state
- B. Atoms of helium is gaseous state at high temperature.
- C. Molecules of solid I2
- D. Molecule of H-Cl gas
|
| 10 |
Which of the given has hydrogen bonding. |
- A. CH4
- B. CCl4
- C. NH3
- D. NaCl
|