Chemistry Fsc Part 1 Online Test With Answers

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Chemistry Fsc Part 1 Online Test

Sr. # Questions Answers Choice
1 Those elements whose electronegativities are 1.2 and 3.2, react to form Ionic bond Covalent bond Gaseous substance Definiting a liquid substance
2 The shielding effect of the inner electrons is responsible for Increasing ionization energy values Decreasing ionization energy values Increasing electron affinity Increasing electonegativity
3 The octet rule in not followed in the formation of NF<sub>3</sub> CF<sub>4</sub> CCI<sub>4</sub> PCI<sub>5</sub>
4 Which of the following species has unpaired electrons in anti-bonding molecular orbitals O<sub>2</sub><sup>+2</sup> N<sub>2</sub><sup>-2</sup> B<sub>2</sub> F<sub>2</sub>
5 Which of the hydrogen halides has the highest percentage of ionic character HF HBr HCI HI
6 Which of the following molecules has zero dipole moment NH<sub>3</sub> CHCI<sub>3</sub> H<sub>2</sub>O BF<sub>3</sub>
7 Which of the following statements is not correct regarding bonding molecular orbitals Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed Bonding molecular orbitals have low electron density between the two nuclei Every electron in the bonding molecular orbitals contributes to the attraction between atoms Bonding molecular orbitals are formed when the electron waves undergo constructive interference
8 The number of bonds in nitrogen molecule is One o and one<span style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; background-color: rgb(255, 255, 248);">π</span> One o and two<span style="font-family: &quot;Times New Roman&quot;; font-size: 18px; color: rgb(34, 34, 34); box-sizing: border-box; background-color: rgb(255, 255, 248);">π </span> Three sigma only Two o and two<span style="font-family: &quot;Times New Roman&quot;; font-size: 18px; color: rgb(34, 34, 34); box-sizing: border-box; background-color: rgb(255, 255, 248);">π</span>
9 An ionic compound A+B-is most likely to be formed when The ionization energy of A is high and electron affinity of B is low The ionization energy of A is low and electron affinity of B is high Both the ionization energy of A and electron affinity of B are high Both the ionization energy of A and electron affinity of B are low
10 Bohr's model of atom is contradicted by Planck quantum theory Quartization of energy of electrons Heisenberg's uncertainty principle Quartization of angular members
11 The charge on electron was determined by millikan in his oil drop experiment and its value is 6.023 x 10<sup>-23</sup>C 1.602 x 10<sup>-23</sup>C 1.602 x 10<sup>-19</sup>C 6.625 x 10<sup>-34</sup>C
12 Which of the following represents electronic configuration of the most electropositive elements He [ 2s<sup>-1</sup>] Xe [6s<sup>1</sup>] He [2s<sup>2</sup>] Xe [6s<sup>2</sup>]
13 Which of the following particles would on losing an electron has its outermost p-orbital as half filled Nitrogen atom O<sup>+</sup>ion P<sup>-1</sup>ion S<sup>+1</sup>ion
14 The azimuthal quantum number / = 2, then M(Magnetic quantum number) can have values as +1, -1 +1, 0, -1 +2, +1, 0,1, -1, 2 +3, +2, +1, 0, 1, -2, -3
15 If uncertainty position of an electron is zero, the uncertainty in its momentum would be Zero Infinite Both a and b None of these
16 The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in Visible region X-Ray region I.R region U.V. region
17 Anode rays were discovered by J. Stoney Rutherford J.J. Thomson Goldstein
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