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 The melting point is lowest for Be Mg Ca Sr
2 The number of elements in the 4th periods of periodic table is 8 10 18 32
3 The oxides of which of the following elements will be acidic in character Mg Rb Li Cl
4 Which of the following is an inert gas? H<sub>2</sub> O<sub>2</sub> N<sub>2</sub> Argon
5 Which of the following oxides is amopheric in character? CaO CO<sub>2</sub> SiO<sub>2</sub> SnO<sub>2</sub>
6 Which of the following ion has the highest value of ionic radius? Li<sup>+</sup> F<sup>-</sup> O<sup>2-</sup> B<sup>3+</sup>
7 The elements with atomic numbers 9, 17, 35, 53, 85 an all Noble gases Halogens Heavy metals Light metals
8 How does the ionization energy of 1st group elements vary? Increases down the group Decreases down the group Remains unchanged Variation is not regular
9 Number of elements present in 5th period is 8 18 32 24
10 Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be Ionic Covalent Coordinate Metallic
11 Electron affinity depends on Atomic size Nuclear charge Atomic number Atomic size and nuclear charge both
12 Which is true about the electronegativity order of the following? P &gt; Si C &gt; N Br &gt; Cl Sr &gt; Ca
13 Eka-aluminium and Eka-silicon are known as Gallium and Germanium Aluminium and silicon Iron and sulphur Proton and silicon
14 Which among the following species has the highest ionization energy? Ne F Li B
15 Which of the following does not exhibit the periodicity in properties of the elements? Ionisation energy N/P ratio Electronegativity Atomic radius
16 Which of the following sets of atomic numbers belong to that of the alkali metals? 1,12,30,4,62 37,19,3,55 9,17,35,53 12,20,56,88
17 Which of the following isoelectronic ions has the lowest ionization energy? K<sup>+</sup> Ca<sup>2+</sup> Cl<sup>-</sup> S<sup>2-</sup>
18 The atomic radius increases as we move down a group because Effective nuclear charge increases Atomic mass increases Additive electrons are accommodated in new electron level Atomic number increases
19 Which of the following statement about fluorine is not correct? Electron affinity of chlorine is greater than that of fluorine Bond energy of fluorine is less than that of chlorine Fluorine cannot be prepared by electrolysis of fused metal fluorides Fluorine does not form oxoacid
20 The element with highest electron affinity among the halogen is F Cl Br I
21 The ionization potential is lowest for the Halogens Inert gases Alkaline earth metals Alkali metals
22 In the modern long form of the periodic table elements are arranged in the increasing order of Atomic mass Atomic number Mass number Isotopic number
23 Variable valency is characteristic of Halogen Transition elements Alkali metals Noble gas
24 The correct order of electron affinity among the following is F &gt; Cl &gt; Br Br &gt; Cl &gt; F Cl &gt; F &gt; Br F &gt; Br &gt; Cl
25 Which of the following is most electronegative? Carbon Silicon Lead Tin
26 Which of the following element has the maximum electron affinity? F S I Cl
27 Which of the following has highest first ionization potential? Carbon Oxygen Nitrogen Boron
28 Which of the following species has the highest ionization potential? Ne Al<sup>+</sup> Mg<sup>+</sup> Li<sup>+</sup>
29 Gradual addition of electronic shells in the nobel gases causes a decrease in their Ionization energy Atomic radius Boiling point Density
30 In the periodic table, the element with atomic number 16 will be placed in the group Fourteen Sixteen Thirteen Fifteen
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