12th class (Fsc) Chemistry unit 5 MCQs
chapter 5 MCQs 12th Class Chemistry
The Halogens And The Noble Gases:
1. The name of halogens comes from Greek work hales and Gennan, whose meaning is:
a. To form sal
b. Copper giver
c. Light bearing
d. None
2. Which of the following relates the electronic configuration of halogens?
a. ns2np1
b. ns2np5
c. ns2np3
d. ns2np4
3. Which of the following halogens is a rare halogen:
a. F2
b. At
c. Cl2
d. Br2
4. Which is radioactive element in the following group VIIA elements?
a. Cl
b. F
c. At
d. Br
5. The color of Bromine gas is:
a. Red-brown
b. Pale yellow
c. Grayish black
d. Greenish yellow
6. What is color of I2 in CCI4 ?
a. Brown
b. Colorless
c. Violet
d. Bluish green
7. Which member of halogens is purified by sublimation?
a. Iodine
b. Fluorine
c. Bromine
d. Chlorine
8. Which member of halogens is radioactive?
a. F
b. l
c. At
d. Br
9. In which phase halogens exist:
a. Solid
b. Gas
c. Liquid
d. All of given
10. Due to low dissociation energy, F2 molecule is:
a. Non reactive
b. Highly reactive
c. Intermediate reactive
d. Less reactive
11. F2 shows oxidation state:
a. -2
b. -1
c. Zero
d. -1.-2
12. Which of the following has high lattice energy?
a. CaBr2
b. CaF2
c. Cal2
d. CaCI2
13. Which of the following is insoluble in water?
a. CaBr2
b. CaF2
c. Cal2
d. CaCI2
14. The order of decreasing power of halogens as an oxidizing agent is:
a. F2>CI2>Br2>I2
b. K>Br2>CI2>F2
c. I2>F2>Br2>CI2
d. Brz>F2>CI2>I2
15. The oxidizing power of halogens depends upon:
a. Hydration energy
b. Energy of dissociation
c. E.A
d. All of these
16. Fluorine does not show positive oxidation state. due to the absence of:
a. d-orbital
b. s-orbital
c. p-orbital
d. None of these
17. Which one of the following will displace Br from an aqueous solution containing Br ion?
a. Cl
b. l2
c. l3
d. Cl2
18. Which halogen has highest first ionization energy?
a. CI
b. Br
c. I
d. F
19. The fluorine can show only -1 oxidation state due to:
a. Restriction of valence shell to an octet
b. Heigh electro negativity
c. Greater reactivity
d. Small size
20. Which of the following hydrogen halides is not a gas?
a. HF
b. HBr
c. HCL
d. HI
21. Which of the following hydrogen halides is a colorless volatile liquid?
a. HF
b. HBr
c. HCL
d. HI
22. H-bonding is present in:
a. HF
b. HBr
c. HCL
d. HI
23. Which acid cannot be stored in glass bottles?
a. HNO3
b. HF
c. H2SO4
d. HCL
24. Which of the following is most ionic?
a. HBr
b. HF
c. HI
d. HCL
25. Which one the following has highest melting point and boiling points?
a. HBr
b. HF
c. HI
d. HCL