PPSC Chemistry Full Book Test With Answers

image
image
image

PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Mostly used solvents for ionic compounds. Liquid ammonia Liquid SO2 Liquid HF All above
2 By applying an external force the ionic solid can be easily broken to powder form so the ionic solid are highly Hard Brittle Tough Soft
3 The unit of sodium chloride structure is. Linear Cubic Tetrahedral Square planner
4 Solid substances consist of an ordered any of ions and solid as a whole is electrically. Conductor Neurtal Acidic Basic
5 Variable electrovalency is due to the following reasons. Unstable configuration of core Inset electron pair effect All of above None of above
6 Stable metal ions strictures are. Noble gas structure Is electron group structure Transition metal in structure All of the above
7 The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called. Ionic bond Covalent bond Mettalic bond Co ordinates bond
8 Non localised bonds are referred as Metallic bond Long range bonds Ionic bond Covalent bonds
9 Ionic bond are also forces called as. Polar bond Electrovalent bond None polar bond Both A and B
10 When two H atoms approach each other then forces operates. Attractive forces Repulaive forces Attractive and repulsive None of above
11 A stable molecule is a group of atoms held together by Chemical forces Physical forces Valence force None of above
12 The forces which holds the atoms together in a molecule is called Ionic bond Covalent bond Co ordinate bond Chemical bond
13 A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is . 2 1 0 3
14 Which of the following molecule does not contain the covalent bond between similar atoms. N2H4 F2O2 H2F2 H2O2
15 In the formation of H2O molecule, the oxygen atom makes use of. 2p orbitals sp hybrid orbitals Sp2 hybrid orbitals Sp3 hybrid orbitals
16 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
17 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
18 In vinyl cyanide, the number of a bonds in 2 3 1 4
19 In which of the following species the bonds are non directional. NCl3 RbCl BeCl2 BCl3
20 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.
21 The Lewis structure of which of the following does not have coordinate bond. SO2 HNO3 H2SO4 HNO2
22 Which of the following molecule contains two dative bonds according to Lewis structure. NH3 SO3 PCl5 BF3
23 The number of electrons involved in bonding in Lewis structure of oxalate ion is 20 14 22 18
24 In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is. 8 16 12 20
25 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
26 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
27 In bi sulphate ion, the formal charge on sulphru atom is. +1 +2 +4 +6
28 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
29 Which element out of the following can exhibit a maximum co valency of seven.

 Chlorine Fluorine Sulphur Both Cl and F
30 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
Download This Set

Is this page helpful?

×