ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Which of the following elements is most metallic? P As Sb Bi
2 Which of the following fluorides does not exists? NF<sub>5</sub> PF<sub>5</sub> AsF<sub>5</sub> SbF<sub>5</sub>
3 Phosphorus pentoxide finds use as An oxidizing agent A reducing agent A bleaching agent A dehydrating agent
4 Red P can be obtained form white P by Heating it with a catalyst in an inert atmosphere Distilling it in an inert atmosphere Dissolving it in CS<sub>2</sub>and crysllizing Melting it ad pouring the liquid into water
5 White P when boiled with strong solution of caustic soda produces Phosphine Posh acid Phosphorous acid None
6 Phosphine is not obtained by the reaction when White P is heated with NaOH Red P is heated with NaOH Ca<sub>2</sub>P<sub>2</sub>reacts with water PH<sub>4</sub>l is boiled with water
7 Each of the following is true of white and red phosphours except that they Are both soluble in CS<sub>2</sub> Can be oxidized by heating in air Consist of the same kind of atoms Can be converted into one another
8 Which on of the following compounds does not exist? NCl<sub>5</sub> AsF<sub>5</sub> SbCl<sub>5</sub> PF<sub>5</sub>
9 BiCl3on hydrolysis forms a white precipitate of Bismuthio acid Bismuth oxychloride Bismuth pentachloride Bismuth hydroxide
10 Phosphide ion has the electronic structure similar to that of Nitride ion Fluoride ion Sodium ion Chloride ion
11 Which one of the following elements occurs free in nature? N P As Sb
12 The melting point is lowest for Be Mg Ca Sr
13 The number of elements in the 4th periods of periodic table is 8 10 18 32
14 The oxides of which of the following elements will be acidic in character Mg Rb Li Cl
15 Which of the following is an inert gas? H<sub>2</sub> O<sub>2</sub> N<sub>2</sub> Argon
16 Which of the following oxides is amopheric in character? CaO CO<sub>2</sub> SiO<sub>2</sub> SnO<sub>2</sub>
17 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>
18 The elements with atomic numbers 9, 17, 35, 53, 85 an all Noble gases Halogens Heavy metals Light metals
19 How does the ionization energy of 1st group elements vary? Increases down the group Decreases down the group Remains unchanged Variation is not regular
20 Number of elements present in 5th period is 8 18 32 24
21 Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be Ionic Covalent Coordinate Metallic
22 Electron affinity depends on Atomic size Nuclear charge Atomic number Atomic size and nuclear charge both
23 Which is true about the electronegativity order of the following? P &gt; Si C &gt; N Br &gt; Cl Sr &gt; Ca
24 Eka-aluminium and Eka-silicon are known as Gallium and Germanium Aluminium and silicon Iron and sulphur Proton and silicon
25 Which among the following species has the highest ionization energy? Ne F Li B
26 Which of the following does not exhibit the periodicity in properties of the elements? Ionisation energy N/P ratio Electronegativity Atomic radius
27 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
28 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>
29 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
30 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
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