PPSC Chemistry Part III Inorganic Chemistry Online Test With Answers

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PPSC Chemistry Part III Inorganic Chemistry Online Test

Sr. # Questions Answers Choice
1 A stable molecule is a group of atoms held together by Chemical forces Physical forces Valence force None of above
2 The forces which holds the atoms together in a molecule is called Ionic bond Covalent bond Co ordinate bond Chemical bond
3 A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is . 2 1 0 3
4 Which of the following molecule does not contain the covalent bond between similar atoms. N2H4 F2O2 H2F2 H2O2
5 In the formation of H2O molecule, the oxygen atom makes use of. 2p orbitals sp hybrid orbitals Sp2 hybrid orbitals Sp3 hybrid orbitals
6 The geometry of the molecule is primarily decided by Bond pairs around the central atom No of k bond around the central atom No of bond pairs as well as lone pairs around the central atom No. of lone pairs on central atom
7 The configuration of valence shell of certain atom X is 3s2 , 3p5, which valences can it exhibit. 1,3 only 1,5 only 1,3,5,7 1,3,4
8 In vinyl cyanide, the number of a bonds in 2 3 1 4
9 In which of the following species the bonds are non directional. NCl3 RbCl BeCl2 BCl3
10 Which of the following statements is correct. A sigma bond is weaker than a pi pond There are four coordinate bonds in the Lewis structure of NH4+ ion. The 1 covalent bond is directional in nature A single bond between the two atoms cannot be re bond.
11 The Lewis structure of which of the following does not have coordinate bond. SO2 HNO3 H2SO4 HNO2
12 Which of the following molecule contains two dative bonds according to Lewis structure. NH3 SO3 PCl5 BF3
13 The number of electrons involved in bonding in Lewis structure of oxalate ion is 20 14 22 18
14 In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is. 8 16 12 20
15 Which of the following statements in incorrect. Sodium hydride is ionic Beryllium chloride is covalent CCl4 gives a white ppt with AgNO3 solutions. Bonds in NaCl are non directional
16 Which of the following is not a characteristic of covalent compound. They have low melting and boiling points. They ionize on dissolution in polar solvents Their molecules have definite geometry They are generally insoluble in water
17 In bi sulphate ion, the formal charge on sulphru atom is. +1 +2 +4 +6
18 Which of the following element has six electrons in the valance shell but cannot exhibit a maximum co valency of six. Sulpher Oxygen Salenium Both A and B
19 Which element out of the following can exhibit a maximum co valency of seven.

 Chlorine Fluorine Sulphur Both Cl and F
20 The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are. 2 ,1 2,2 3,1 3,0
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