MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A substance containing one band completely filled with electrons and other band completely empty, but with a possibility of the empty band becoming populated, behaves as a _________ |
| A. | metal |
| B. | non-metal |
| C. | semiconductor |
| D. | metal and non-metal |
| Answer» D. metal and non-metal | |
| 2. |
For a metallic crystal, which band do the delocalized electrons occupy? |
| A. | Conduction band |
| B. | Valence band |
| C. | Both, conduction and valence bands |
| D. | There are no delocalized electrons |
| Answer» B. Valence band | |
| 3. |
According to the band theory, increase in number of atoms participating in crystal formation leads to ________ in number of molecular orbitals containing electrons. |
| A. | decrease |
| B. | increase |
| C. | no change |
| D. | either increase or decrease, depending upon the size of the atoms |
| Answer» C. no change | |
| 4. |
Which of the following properties holds true for a metalloid? |
| A. | Poor conductors of heat and electricity |
| B. | Malleable |
| C. | Ductile |
| D. | Non-brittle |
| Answer» B. Malleable | |
| 5. |
Metals are good conductors of heat and electricity. This property is conferred by _______ bonds. |
| A. | covalent |
| B. | ionic |
| C. | metallic |
| D. | hydrogen |
| Answer» D. hydrogen | |