1. Among the halogens the rare element is
A. Fluorine
B. Chlorine
C. Astatine
D. Iodine
✅ The correct answer is option C.
The Halogens and The Noble Gases MCQs
2. The colour of chlorine gas is
A. Pale yellow
B. Greenish yellow
C. Reddish brown
D. Greyish black
✅ The correct answer is option B.
4. The most powerful oxidizing agent among the halogens is
A. F2
B. Cl2
C. Br2
D. I2
✅ The correct answer is option A.
5. Which of the following statements is incorrect about fluorine
A. Fluorine is restricted to -1 oxidation state
B. Fluorine follows octet rule and as well as extended octet rule
C. Fluorine has the lowest dissociation energy among the halogens
D. Both B and C
✅ The correct answer is option D.
6. The halogen which reacts spontaneously with gold (Au) to form Au+3 is
A. F2
B. Cl2
C. Br2
D. I2
✅ The correct answer is option B.
7. Which one of the following is the weakest acid in water
A. HF
B. HCI
C. HBr
D. HI
✅ The correct answer is option A.
8. The halogen which reacts very slowly with halogen is
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
✅ The correct answer is option D.
9. Which of the following represents the correct electronic configuration of VII A group elements in the ground state?
A. ns2p2
B. ns2p4
C. ns2p5
D. ns2p6
✅ The correct answer is option C.
10. The halogen having highest electron affinity is
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
✅ The correct answer is option B.