ECAT Chemistry Online Test With Answers

image
image
image

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 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>
2 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
3 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
4 The element with highest electron affinity among the halogen is F Cl Br I
5 The ionization potential is lowest for the Halogens Inert gases Alkaline earth metals Alkali metals
6 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
7 Variable valency is characteristic of Halogen Transition elements Alkali metals Noble gas
8 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
9 Which of the following is most electronegative? Carbon Silicon Lead Tin
10 Which of the following element has the maximum electron affinity? F S I Cl
11 Which of the following has highest first ionization potential? Carbon Oxygen Nitrogen Boron
12 Which of the following species has the highest ionization potential? Ne Al<sup>+</sup> Mg<sup>+</sup> Li<sup>+</sup>
13 Gradual addition of electronic shells in the nobel gases causes a decrease in their Ionization energy Atomic radius Boiling point Density
14 In the periodic table, the element with atomic number 16 will be placed in the group Fourteen Sixteen Thirteen Fifteen
15 Among the elements given below, the one with highest electropositivity is Cu Cs Cr Ba
16 The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is Mg &lt; K &lt; Na &lt; Rb Mg &lt; Na &lt; K &lt; Rb Mg &lt; Na &lt; Rb &lt; K Na &lt; K &lt; Rb &lt; Mg
17 Alkali metals in each period have Smallest size Lowest IE Highest IE Highest electronegativity
18 The element with atomic number 55 belongs to which block of the periodic table s-block p-block d-block f-block
19 The attraction that an atom exerts on a pair of electrons that are being shared with another atom for forming covalent bond is referred to as its Electron affinity Electronegativity Ionisation energy Valency
20 Among O, C, F, Cl, Br, the correct order of increasing radii is F O C Cl Br F C O Cl Br F Cl Br O C C O F Cl Br
21 Among the following elements which one has the highest value of first ionization potential? Oxygen Argon Barium Cesium
22 The element with atomic number 26 will be found in group 2 8 6 10
23 Which of the following pair of atomic numbers represents s-block elements? 7, 15 6, 12 9, 17 3, 20
24 The valence shell electronic structure of an element is ns2np5. The element will along to the group of Alkali metals Inert metals Noble gases Halogen
25 The valency of noble gases, in general, is Zero One Three Two
26 Which among the following elements have lowest value of IE1? Pb Sn Si C
27 Of the given alkali metals, the one with smallest size is Rb Cs K Na
28 Which of the following elements is/are not liquid at 30°C? Ga Hg Ge Cs
29 Which of the following metal requires radiation of highest frequency to cause emission of electrons? Na Mg K Ca
30 Which of the following does not reflect the periodicity of elements? Bonding behaviour Electronegativity Ionisation potential Neutral/proton ratio
Download This Set
×