11th class (FSc) chemistry Unit 6 MCQs
Chapter 6 MCQs 11th Class Chemistry
Chemical Bonding:
1. Which one of the following molecule do not have obey Octet rule?
a. PF5
b. CH4
c. CS2
d. CO2
2. Bond energy of hydrogen (H2) molecule is:
a. 436 kJ mol-1
b. 410 kJ mol-1
c. 415 kJ mo-1l
d. 450 kJ mol-1
3. Octet rule is not following the formation of:
a. CCl4
b. NF3
c. PCl5
d. CF4
4. Which of the following molecule obey octet rule?
a. NH3
b. BF3
c. SF6
d. BCl4
5. Atoms of …… element has independent existence:
a. Oxygen
b. Fluorine
c. Nitrogen
d. Krypton
6. The elements having low ionization energy are:
a. Semi-metal
b. Non-metal
c. Metalloids
d. Metals
7. Ionization energy of Mg →Mg+ + le ha s △H ……:
a. 448 KJ mol–
b. 738 KJ mol–
c. 138 KJ mol–
d. 238 KL mol–
8. Which element has highest inonization potential?
a. Li
b. B
c. C
d. Be
9. Which one has highest value of ionization energy?
a. O
b. Be
c. F
d. C
10. The amount of energy released by absorbing electon in the valence shell is:
a. Electro negativity
b. Ionization
c. Atomization
d. Electron affinity
11. …… element has highest value of electron affinity:
a. Bromine
b. Fluorine
c. Iodine
d. Chlorine
12. The highest elecronegative element in the periodic table is:
a. Chlorine
b. Oxygen
c. Fluorine
d. Nitrogen
13. Which of the following is not isoelectronic with rest of the three:
a. Cl–
b. K+
c. S-2
d. Na+
14. Ionic compound are moslty obtained by the combination of group:
a. 4 and 8
b. 3 and 5
c. 1 and 7
d. 2 and 5
15. The electronic configuration of an atom is 1s2,2s2,2p4 , the number of unpaired electrons is:
a. 4
b. 0
c. 6
d. 2
16. Which of the following species has configuration of neon?
a. Cl–
b. Na+
c. Ca+2
d. None of these
17. The most stable element are:
a. Nobel gases
b. Halogens
c. Lithium family
d. None of these
18. An ionic compound A+B is most likely to be formed when:
a. Both ionization energy of A and electron affinity of B are high
b. The ionization energy of A is high and electron affinity of B is low
c. Both ionization energy of A and electron affinity of B are low
d. The ionization energy of A is low and electron affinity of B is high
19. The ion that is isoelectronic with CO is:
a. O2
b. CN–
c. O+
d. None of these
20. Which of the following molecule has a co-ordinate covalent bond?
a. HCL
b. NH3
c. NH4Cl
d. AlCl3
21. The four equivalent sp3 hybrid orbitals in space at an angle of:
a. 104.5o
b. 120o
c. 109.5o
d. 107.5o
23. The hybridization in ammonia molecule is:
a. SP3
b. Dsp2
c. SP
d. SP2
24. The experimentally determined bond angle in NH3 is:
a. 104.5o
b. 109.5o
c. 102.5o
d. 107.5o
25. The geometry of ethane is:
a. Linear
b. Tetrahedral
c. U.shaped
d. Trigonal planer