Chemistry Fsc Part 1 Chapter 6 Online Test With Answers

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Chemistry Fsc Part 1 Chapter 6 Online Test

Sr. # Questions Answers Choice
1 BF3 has zero while NH3 has 1.49 D dipole moment because. B is less electronegative than N F is more electronegative than N BF3 is pyramidal while NH3 is planar NH3 is pyramidal while BF3 is trigonal planar
2 Dipole moment is defined as. Charge x distance Charge x Debye Charge x displacement Charge x bond energy
3 Bond energy depends upon Electronegativity Size of atom Bond length All of these
4 Which bond has more ionic characters in it. C - F N - F O - F F - F
5 Which of the following molecules have highest bond energy F2 Cl2 Br2 I2
6 What is bond order. Number of unpaired electrons Number of paired electrons Number of electrons present in antibonding molecular orbital Number of bond formed between two atoms after overlap
7 A molecular orbital can accommodate maximum electron 2 6 8 10
8 According to MOT, which molecular orbital has highest energy. sigma 1s pi+ 2S pi 2py Pi+ 2px
9 Which one of the following molecules is paramagnetic. H2 He N2 O2
10 Which of the following molecules have unpaired electrons is the bonding molecular orbitals. N2 O2 B2 F2
11 In BeCl2, the covalent bond is formed due to overlap of sp -s sp -p sp2 -p sp3 -p
12 The percentage of s characters in sp3 hybrid orbital is. 25% 33.3% 50% 75%
13 As compared to pure atomic orbitals the hybrid orbitals have. Low energy High energy Same energy None of these
14 How many sigma and pi bonds are present in C2H2. one sigma and two pi two pi and one sigma Two pi and three sigma Three pi and two sigma
15 In which molecule all atoms are coplanar. CH4 BF3 NH3 PH3
16 In which one of the following pairs do the molecule have similar shape. BF3 and AlCl3 CO2 and H2O CH4 and PH3 NH3 and BCl3
17 Both CH4 and NH3 are four electron pair system the angles of CH4 and NH3 are 109.5o and 107.5 o respectively. This deviation is due to. Hydrogen bonding in ammonia Lone pair attraction Lone pair occupy more space and repel to other bond pairs Lone pair lone pair repulsion
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