ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test With Answers

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ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test

Sr. # Questions Answers Choice
1 Which element should have the greatest value for electronegativity when combined with hydrogen Na Si S Cl
2 Which of the following elements have the largest radius F Cl Br l
3 Which of the following elements should be the least metallic in character Rb ln Te l
4 Gradation in properties in the periods of periodic tables are due to change in Atomic weight The number of electrons Number of protons Electronic configuration
5 The most distinctive character among the elements is their division into Metals and non-metals Solids, liquids and gases Atoms and molecules Active and inactive elements
6 Which of the following discoveries resulted in a version of the Mendeleefs
periodic law
 The nucleus of atom by Rutherford The elements polonium and radium by the Curies Atomic numbers by Moseley x-rays by Roentgen
7 The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion Increases with increase of charge to mass ratio Decreases with increase of charge to mass ratio Depends on sign of charge +ve or -ve Depends upon the solvent
8 Although hydrogen resemble with the elements of group lA, IVA and Vll but it is usually placed in Group IA Group IV A Group VII Group VIII
9 Which of the following is a member of -block Zn Al B Br
10 The fourteen elements following actinium are known as Lanthanones Lanthanides Rare earths Actinides
11 The fourth period contains elements 8 16 18 32
12 What is the nature of Al2O3 Acidic Basic Amphoteric Neutral
13 What is the nature of SO2 Basic Strongly acidic Weakly acidic Amphoteric
14 Na2O is Acidic Basic Neutral Amphoteric
15 A pair of elements in the same family in the periodic classification is Cl and C Ca and Al N and Ne Na and K
16 The elements of group lA are called Chalocogens Halogens Alkali metals Alkaline earth metals
17 The oxides of electronegative elements are Basic neutral Acidic Amphoteric
18 The coinage metals are Ni, Pd, Pt Cu, Ag, Au Zn, Al, Pb Fe, Si, Sn
19 In a period, melting points of elements Increases Decreases Remain constant First increases then decreases
20 Ionization energy depends upon Nuclear charge Atomic size Shielding effect All of the above
21 In a group, the ionization energy Increase Decreases Remain constant First increases then decreases
22 The amount of energy required to remove an electron from an atom of an element in the gaseous state is called Electron affinity Electronegatively Ionization energy None of these
23 Which is the transition element among the following B Al Cu Cs
24 In sixth period 14 of its transition elements are called Lanthanides Actinides Radioactive elements None
25 The correct order of 2nd l.P. of C,N,O and F is O > F > N > C O > N > F > C C > N > O > F F > O > N > C
26 Which is the longest period of the periodic table 5th 7th 6th 2nd
27 Which orbital is in the process of completion in case of transition elements p-orbital f-orbital d-orbital s-orbital
28 Number of elements in the first period of the periodic table are Two Four One Eight
29 The energy absorbed when an electron is added to a gaseous atom to form a gaseous ion is called Electron affinity Ionization energy Both of these None of these
30 The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na+, F-are in ppm Na F Na<sup>+ </sup> F<sup>-</sup><div>157 72 95 136</div> Na F Na<sup>+</sup> F<sup>-</sup><div>157 95 172 136</div> Na F Na<sup>+</sup> F<sup>-</sup><div>72 95 136 157</div> Na F Na<sup>+</sup> F<sup>-</sup><div>157 136 95 72</div>
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