12th Class Chemistry Mcqs With Answers Chapter 5| 2nd Year chemistry mcqs with answers pdf

12th Class Chemistry Mcqs With Answers Chapter 1	12th Class Chemistry Mcqs With Answers Chapter 2
12th Class Chemistry Mcqs With Answers Chapter 3	12th Class Chemistry Mcqs With Answers Chapter 4
12th Class Chemistry Mcqs With Answers Chapter 5	12th Class Chemistry Mcqs With Answers Chapter 6
12th Class Chemistry Mcqs With Answers Chapter 7	12th Class Chemistry Mcqs With Answers Chapter 8
12th Class Chemistry Mcqs With Answers Chapter 9	12th Class Chemistry Mcqs With Answers Chapter 10
12th Class Chemistry Mcqs With Answers Chapter 11	12th Class Chemistry Mcqs With Answers Chapter 12
12th Class Chemistry Mcqs With Answers Chapter 13	12th Class Chemistry Mcqs With Answers Chapter 14
12th Class Chemistry Mcqs With Answers Chapter 15	12th Class Chemistry Mcqs With Answers Chapter 16
12th Class Chemistry Mcqs With Answers Chapter 17	12th Class Chemistry Mcqs With Answers Chapter 18
12th Class Chemistry Mcqs With Answers Chapter 19	12th Class Chemistry Mcqs With Answers Chapter 20

Chapter No 5

Halogens And Noble Gases

1. Which of the following hydrogen halide is the weakest acid in solution choose which one is correct:

1. HF
2. HBr
3. HI
4. HCl

2. Hydrogen bonding is the strongest among the molecules of choose which one is correct:

1. HCl
2. HF
3. HI
4. HBr

3. Which of the following halogen is in solid form at room temperature choose which one is correct:

• I₂
• F₂
• Br₂
• Cl₂

4. Which of the halogens is most easily reduced choose which one is correct:

1.  I₂
2. Br₂
3. F₂
4. Cl₂

5. What is the reason for lowest bond dissociation energy of F₂ among the  halogens choose which one is correct:

1. Low I.E
2. Absence of d-orbitals
3. Low lattice energy of salts
4. Repulsion among non-bonding electrons

6. Which silver salt is sparingly soluble in H₂O choose which one is correct:

1. AgF
2. AgBr
3. AgCl
4. AgI

7. All the halogens are coloured. The intensity of the colour depends on choose which one is correct:

1. Valence electron
2. Atomic number
3. Atomic mass
4. None of these

8. Which of the following is the strongest acid choose which one is correct:

1. HClO
2. HClO₂
3. HClO₄
4. HClO₃

9. Oxidation state of Ca in Ca(OCl)Cl (bleaching powder) is choose which one is correct:

1. +3
2. +4
3. +2
4. +1

10. Which of the following has greater volatility choose which one is correct:

1. CH₃F
2. CH₃Cl
3. CH₃Br
4. CH₃I

11. Among fluorides of xenon which is a mild flourinating agent choose which one is correct:

1. XeF₂
2. XeF₄
3. XeF₆
4. All

12. Which one is used for etching of glass choose which one is correct:

1. HBr
2. HF
3. HCl
4. HI

13. Astatine (radioactive element) has a half-life choose which one is correct:

1. 4 hrs
2. 10 hrs
3. 8.3 hrs
4. 4.3 hrs

14. Which halogen occurs naturally in positive oxidation state choose which one is correct:

1. Flamine
2. Chlorine
3. Bromine
4. Iodine

15. The anhydride of HClO₄ is choose which one is correct:

1. ClO
2. ClO₂
3. ClO₃
4. Cl₂O₇

16. Bleaching powder is not used for bleaching choose which one is correct:

1. Cotton
2. Costly fabrics
3. Limen
4. Paper pulp

17. Consider the following reaction

                       _Hot

6NaOH + 3Cl₂ → 5NaCl + NaClO₃ + 3H₂O

                       ^State

the type of above reaction is choose which one is correct:

1. Addition reaction
2. Disproportionation reaction
3. Displacement reaction
4. Decomposition reaction

18. Cl₂O₇ react with H₂O to form choose which one is correct:

1. Hypochlorous acid
2. Chloric acid
3. Perchloric acid
4. Cl₂ and O₂

19. Halogen used in toothpaste, it builds protecting covering choose which one is correct:

1. F
2. Cl
3. Br
4. I

20. Which of the following react with H₂ in dark choose which one is correct:

1. F₂
2. I₂
3. Cl₂
4. Br₂

21. Which of the following is used in radiotherapy choose which one is correct:

1. Rn
2. Xe
3. Kr
4. Ar

22. Who reported the first noble gas choose which one is correct:

1. Cavendish
2. Frankland
3. William Ramsay
4. Rayleigh

23. Which noble gas does not obey octet rule choose which one is correct:

1. Ne
2. He
3. Ar
4. Kr

24. Which is the most polarised noble gas choose which one is correct:

1. Kr
2. Xe
3. He
4. Rn

25. XeF₂ molecule is choose which one is correct:

1. Tetrahedral
2. Linear
3. Pyramidal  
4. Trigonal planar