| 161. | Diamond and graphite are allotropes of |
A. silicone | |
B. nitrogen | |
C. Carbon | |
D. tin |
| 162. | Which of the following does not contain carbon |
A. Diamond | |
B. graphite | |
C. Coal | |
D. none of these |
| 163. | Which of the following statements about diamond are correct? 1. It is used as a gem in jewelry because of its ability to reflect light. 2. It is a good conductor of electricity. 3. It is used for cutting glass, marble stone and other hard materials. It is used for drilling rocks. Select the correct answer using the code given below – |
A. 1,3 and 4 | |
B. 2,3 and 4 | |
C. 1, 2 and 3 | |
D. 2 and 4 |
| 164. | Which of the following is a basic element |
A. sand | |
B. Diamond | |
C. marble | |
D. Sugar |
| 165. | what is the pure form of carbon |
A. Diamond | |
B. graphite | |
C. charcoal | |
D. fullerene |
| 166. | who is the strictest among the following |
A. Diamond | |
B. Glass | |
C. quartz | |
D. platinum |
| 167. | what is a carat in relation to a diamond |
A. chastity | |
B. Burden | |
C. Mass | |
D. density |
| 168. | Which of the following is a good conductor of heat and electricity? |
A. Diamond | |
B. anthracite | |
C. Granite | |
D. graphite |
| 169. | Which of the following is a good conductor of electricity and heat |
A. Diamond | |
B. anthracite | |
C. Granite | |
D. graphite |
| 170. | Which of the following is used in pencils? |
A. phosphorus | |
B. charcoal | |
C. graphite | |
D. sulfur |