ECAT Chemistry Chapter 15 Group IV-A and VI-A Elements Online Test With Answers

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ECAT Chemistry Chapter 15 Group IV-A and VI-A Elements Online Test

Sr. # Questions Answers Choice
1 Allotropic forms of sulpher are Two Three Four Five
2 Allotropic forms of oxygen Te, Se are Two Three Four Five
3 All elements of group VI-A non-metal except Te S Se Po
4 Group VI-A elements are called: Halogens Electron deficient alkaline earth metal Chalcogens
5 Colour of PCl5is: Red Yellowish White Grey Colourless
6 The most stable phosphorus allotrope is White Red Black All
7 Which is the most reactive? White phosphorus Red Phosphorus Graphite Plastic sulphur
8 Structure of P4 is Trigonal Tetragonal Hexagonal Monoclinic
9 Allotropic forms of phosphorus are three four five six
10 Bone ash contains calcium phosphate 70% 80% 90% 100%
11 Posphorus belongs to a group III-A IV-A V-A VI-A
12 Specific gravity of HNO3 is 1.35 1.53 1.39 1.93
13 Colour of N2O4 is Raddish brown Yellow Colouries green
14 Ring testis given by ions. Nitrides Nitrates Cyanates Nitriles
15 Which is an inert gas? Nitrogen Oxygen Hydrogen CO
16 Nitrogen is present in atmosphere 36% 78% 89% 21%
17 Nitrogen is present in atmosphere 21% 36% 89% 78%
18 Which element of group IV-A does not use d-orbital? N P As Sb
19 Which property is not present in non-metals: Predominantly covalent Poor conductor High E.N. Value High electropositivity
20 Calcium carbonates contains oxygen in it: 48% 50% 53% 60%
21 Nitrogen is present in atmosphere by weight: 75% 76% 77% 78%
22 Aqua Regia has ration of conc. HCl and HNO3. 1 : 2 1 : 3 1 : 4 2 : 3
23 NO2forms acidic solution: Red Blue Green Brown
24 Tungsten and Uranium are turned to an reaction with HNO3: Oxides chlorides Nitrides Nitrates
25 SO2is not absorbed in water directly to or H2SO4because: The reaction does not go to completion the reaction is quite slow the reaction is exothemic SO<sub>3</sub>is insolublein water
26 Out of all the elements of group VI-A the highest melting and boiling points is shown by the elements: Te Se S Pb
27 Among group V-A elements, the most electronegative element is: Sb N P As
28 Out of all the elements of group V-A , the highest ionization energy is possessed by: N P Sb Bi
29 Which element of group IV-A does not use d — orbital? N P As Sb
30 Which property is not present in non-methals Predominantly covalent Poor conductor Hig E.N. value High electropositivity
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