PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Anything that influence the valence electrons will affect the chemistry of the element Which of the following factors does not affect the valency shell. Valence principle quantum number in Nuclear charge (Z) Nuclear mass Number of core electrons
2 An element having low IE and low EA is likely to belong to. Group IA Group IB Group VII A Group VIII
3 The element Uuu has atomic numebr 102 111 101 110
4 Which of the following pairs shows diagonal relationship Li and Mg Na and K Zn and Cd Li and BE
5 A property which gradually increases on moving down group in the periodic table is Ionization enthalpy Elemtronegativity Electron affinity atomic size
6 The variable valency is generally observed in case of. Transition elements Inert gases Normal elements Non- metallic elements
7 The element with atomic numebr greater than 100 are known as Trans uranium elements Trans fermium elements Actinides Lanthanides
8 The electromagevitiy of the following elements increase in the order F > Cl > O > S S > Cl > O > F F > O > N > C C > O > N > F
9
Electronegativity is given by
 Average of first and second ionization energies. Average of first and second electron affinites Average of ionization energy and electron affinity None of the above
10 Keeping in view the periodic law and periodic table, suggest which of the following elements should have maximum electronegative character. Oxygen Nitrogen Fluorine Astatine
11 The electronegativity of the following elements increases in the order. C,N, Si, P N, Si, C,P Si, P, C, N P, Si, N, C
12 The most electronegative element of the third period is. F P Br Cl
13 An element with high electronegativity has High IE and high EA High IE and low EA Low IE and High EA Low IE and low EA
14 In each period the most electro negative element belongs to. <sup>Group -1</sup> Group -17 Group -2 Group -18
15 The element having highest ionization energy and least electron affinity belong to Period 1 , group 18 Period 2, group 17 Period 2, group 1 Period 2, group 2
16 The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be. -349 kJ mol -1 349 kJ mol-1 -698 kJ mol-1 698 kJ mol-1
17 The electronic configuration of some elements are given below. The element with highest electron affinity is 1s2, 2s2, 2p3 1s2, 2s2, 2p4 1s2, 2s2, 2p5 1s2, 2s2, 2p6
18 In each period the element with lest electron affinity belongs to. Group 1 Group 14 Group 17 Group 18
19 The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is. C &gt; N &gt; O &gt; F O &gt; N &gt; F &gt; C O &gt; F &gt; N &gt; C F &gt; O &gt; N &gt; C
20 Electron affinities of halogens are in the order. F &gt; Cl &gt; Br &gt; I Cl &gt; F &gt; Br &gt; I Cl &gt; Br &gt; I &gt; F Cl &gt; Br &gt; F &gt; I
21 The correct order of electron affinities is. C &gt; Si, &gt; Na &gt; Ar Si &gt; Cl &gt; Na &gt; Ar C &gt; Na &gt; Si &gt; Ar C &gt; Si &gt; Ar &gt; Na
22 The correct order of electron affinities of SI, P, and Cl is. P &gt; Si &gt; Cl Cl &gt; P &gt; Si Cl &gt; Si, &gt; P Si &gt; P . Cl
23 The magnitude of electron affinity depends on. Atomic size Nuclear charge Electronic configuration All of the above
24 The elements with highest electron affinity belongs to. Period 2 , group 17 Period 3, group 17 Period 2, group 18 Period, 2 , group 1
25 In a period, the element with biggest electron affinity belong to. Group 1 Group 2 Group 17 Group 18
26 The first ionization energy of Mg is lower than Na Ca Al Be
27 Which of the following elements has the highest ionization energy. Na Si Ar Cl
28 Which one of the following statement is incorrect in relation to ionization enthalpy. Ionization enthalpy increase for each successive electron The greatest increase in ionization enthaly is experienced on removal of electron from core noble gas configuration End of the valence electron is marked by a big jump in ionization enthalpy Removal of electron from orbitals bearing lower value to easier than from orbital having highest n value.
29 Which of the following elements has the highest third ionization energy. Sodium Magnesium Aluminum Silicon
30 Among the elements A,B,C and D having atomic numbers 9,10,11, and 12 respectively, the correct order of ionization energies is. A &gt; B &gt; C &gt;D B &gt; A &gt; D &gt; C B &gt; A &gt; C &gt; D D &gt; C &gt; B &gt; A
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