PPSC Chemistry Full Book Test With Answers

image
image
image

PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 According to the VSEPR theory, the shape of the SO3 molecule is. Pyramidal Tetrahedral Trigonal planar Distorted totrahedron
2 Valences bond theory was put forward by Pauling and Slatter Heitler and London Lewis Pauli
3 Which of the following is the correct order of interactions. Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole Van der Waal's < hydrogen bonding < dipole -dipole < covalent Van der Waal's < dipole -dipole < hydrogen bonding < covalent Dipole-dipole < Van der Waal's < hydrogen bonding < covalent
4 The shape of SO42-ion is. Tetrahedral Trigonal planar Square planar Octahedral
5 Which of the following contains both covalent and ionic bond. CCl4 NH4Cl CaCl2 H2O
6 Which of the following species have undistributed octahedral structure. SF6 PF6 Si F<sub>6</sub><sup>2-</sup> XeF6
7 The dipole moments of the given species are such that. BF3 &gt; NF3 &gt; NH3 NF3 &gt; BF3 &gt; NH3 NHE &gt; NF3 &gt;BF3 NH3 &gt; BF3 &gt; NF3
8 Strongest inter molecular hydrogen bond is formed in H2O NH3 HF H2S
9 The interactions in HF are. dipole dipole interasctions Hydrogen bonds dipole -dipole and dispersion forces Hydrogen bond and diapersin forces
10 Which one of following is non polar CH2Cl2 CCl4 CHCl3 CH3Cl
11 Carbon tetra chloried has no net dipole moment because of. Its planar strcture. Its regular tetrahedral structures. Similar sizes of carbon and chlorine atoms Similar electron affinities of carbon and chlorine.
12 Hybridization involves. Orbitals of same atom with slightly different energies. Orbitals of different atoms, but with equal energies. Orbitals of the same atom but with widely different energies. Orbitals of different atoms with different energies.
13 Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is. 1 2 3 0
14 The correct order of increasing polar character is. H2O &lt; NHE &lt; H2S &lt; HF H2S &lt; NH3 &lt; H2O &lt; HF NHE &lt; H2O &lt; HF &lt; H2O HF &lt; H2O &lt; NH3 &lt; H2S
15 Type of hybrid orbitals used by the chlroine atom in CIO2 is. sp2 sp3 sp None of these
16 According to Fajns rules, which one of following results in increased ionic nature of the covalent bond. Larger cation and smaller charges on anion Larger cation and larger charge on anion Smaller cation and smaller charge on anion Smaller cation and larger charge on anion
17 The ion that is isoelectornic with CO is CN- O2+ CO2- N2+
18 The bond between two identical non metal atoms has a pair of electrons. Unequally shared between the two Transferred fully from one atom to another With identical spins Equally shared between them
19 The attraction which exists between carbon dioxide molecules in solid carbon dioxide is due to. Van der Waal's forces Molecule ion forces ionic bonds hydrogen bonds
20 When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule. higher than that of the separate atoms Equal to that of the separate atoms Lower than that of the separate atoms Sometimes lower and sometime higher.
21 On hybridization of one s and one p orbitals we get. Two mutualy perpendicular orbitals Two orbitals at 180<sup>o</sup> Four orbitals directed tetrahedrally Three orbitals in a plane
22 The hybridization of sulphur in sulphur dioxide is. sp sp2 sp3 dsp2
23 The hydrogen bond is strongest in. O - H .............S S - H.............O F- H....................F F - H...............O
24 Which of the following bonds between carbon -carbon is teh strongest. Sigma bond Pi bond Double bond Triple bond
25 Which one of the following has a linear structure. H2O CO2 <font face="sans-serif, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">NO2</span></font> SO2
26 Co ordinate covalent bond found is formed by the Transference of electrons Sharing of electrons Donation of electrons None of these
27 The most important conditions for the formation of ionic bond are. High ionization energy of the metallic atom and high electron affinity of the non metallic atom. Low ionization of the metallic atom and low electron affinity of the non metallic atom. Low ionization energy of metallic atom and high electron affinity of the non metallic atom High ionization energy of the metallic atom and high electron affinity of non metallic atom.
28 Which of the following have identical bond order. CN- and O2- CN - and NO+ O2- and CN+ NO+ and CN+
29 Which of the following is diamagnetic O2 O2+ O2- O2 <sup>2-</sup>
30 The order in O2+ is 1.0 1.5 2.0 2.5
Download This Set

Is this page helpful?

×