| 1 |
Diamond is a bad conductor of electricity because |
- A. It has a tight structure
- B. It has a high density
- C. There are no free electrons present in the crystal of diamond to conduct electronics
- D. None of these
|
| 2 |
Which one of the following inter molecular forces are present in neon gas molecules. |
- A. Hydrogen bond
- B. dipole -Dipole attraction
- C. London dispersion force
- D. Hydrogen bonding and London dispersion force
|
| 3 |
The polarizabilities of elements mostly increase down the group due to the reason that |
- A. The atomic numbers increase
- B. Number of protons increase
- C. Number of shells increase along, with increase of shielding effect
- D. The behavior of the elements remain the same
|
| 4 |
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
|
| 5 |
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
|
| 6 |
Allotropy is the property of. |
- A. Compound
- B. Element
- C. Atom
- D. Mixtuer
|
| 7 |
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
|
| 8 |
Ionic solid are characterized by. |
- A. Low melting point
- B. Good conductivity in solid state
- C. High vapours pressure
- D. solubility in polar solvent
|
| 9 |
Which of the following is psuedo solid |
- A. CaF2
- B. Glass
- C. NaCl
- D. All
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| 10 |
NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by |
- A. 2-unit cells
- B. 4-unit cells
- C. Only one unit cell
- D. 8-unit cells
|