291. Which of the following is not a feature of solids:
A. Definite Volume
B. Frequent fluidity
C. Rigidity
D. Definite shape
292. Which of the following is not characteristic of amorphous solids?
A. Sharp melting point
B. Non-orderly management
C. Isotropy
D. Tendency to undergo irregular cleavage
293. Which of the following is not the property of crystalline solid?
A. Isotropy
B. Sharp melting point
C. Orderly arrangement
D. Cleavage plane
294. Which of the following pairs are non-crystalline Solids?
A. Diamond, Wood
B. Glass, Table salt
C. Wood, Glass
D. Sucrose, glass
295. Which of the following is a molecular crystal?
A. Ice
B. I2
C. Wax
D. Both A and B
296. Which type of solid is generally more conductor of electricity?
A. Metallic
B. Covalent
C. Ionic
D. Molecular
297. Which group of elements in the periodic table contains the halogens?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
298. How many elements are there in the halogen group?
a) 4
b) 5
c) 6
d) 7
299. Which of the following is not a halogen?
a) Fluorine
b) Chlorine
c) Iodine
d) Argon
300. What is the electronic configuration of halogens?
a) ns²np³
b) ns²np⁴
c) ns²np⁵
d) ns²np⁶
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