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 What are non-metals? Sb & Bi P & Bi N & P As & N
2 Which element belongs to group V-A? Cs Ba Sr Bi
3 Which gas is heavier than air? CO<sub>2</sub> NH<sub>3</sub> Cl<sub>2</sub> CO<sub>2</sub>
4 Which has sweetish taste? N<sub>2</sub>O NH<sub>3</sub> Cl<sub>2</sub> CO<sub>2</sub>
5 Which is nitrous acid? HNO<sub>3</sub> HNO HNO<sub>2</sub> H<sub>2</sub>NO<sub>3</sub>
6 Formation of NO from N2 and O2 requires temp 30<sup>0</sup>C 300<sup>0</sup>C 3000<sup>0</sup>C 30000<sup>0</sup>C
7 Which can be prepared from HNO3? T.N.T Fertilizers Picric acid All of these
8 Which is laughing gas? NO N<sub>2</sub>O NO<sub>2</sub> NO<sub>3</sub>
9 Which is aqua regia? HCL : NO HCl : HNO<sub>3</sub> HCl : H<sub>2</sub>SO<sub>4</sub> H<sub>2</sub>SO<sub>4 </sub>: HNO<sub>3</sub>
10 Sulphuric acid is used As fertilizers As dehydrating agent As oxidizing agent All above
11 Calcium carbonate contains oxygen in it 48% 50% 53% 60%
12 Which are metalloid? Nitrogen and phosphorous Arsenic and phosphorous antimony Phosphorous and arsenic Antimony and bismuth
13 Nitrogen is present in atmosphere by weight 75% 76% 77% 78%
14 Which phosphorus is the most poisonous? White Red Black All
15 Aqua Regia has ratio of conc. HCl and HNO3 1 : 2 1 : 3 1 : 4 2 : 3
16 NO2 forms acidic solution Red Blue Green Brown
17 Tungsten and uranium are turned to an reaction with HNO3 Oxides Chlorides Nitrides Nitrates
18 Reaction of HNO, with very dilute Zinc and at low temperature gives H<sub>2</sub> NO NO<sub>2</sub> NH<sub>4</sub>
19 Which has garlic like odour? N<sub>2</sub>O NO NO<sub>2</sub> NH<sub>4</sub>
20 Which of the following species has the maximum number of unpaired electrons? O<sub>2</sub> O<sub>2</sub><sup>+</sup> O<sub>2</sub><sup>-</sup> O<sub>2</sub><sup>-2</sup>
21 Which catalyst is used in contact process? Fe<sub>2</sub>O<sub>3</sub> V<sub>2</sub>O<sub>5</sub> SO<sub>3</sub> Ag<sub>2</sub>O
22 SO3 is not absorbed in water directly to or H2SO4 because the reaction does not go to completion. the reaction is quite slow. the reaction is exothermic. SO<sub>3</sub> is insoluble in water.
23 Out of all the elements of group V1-A the highest melting and boiling points is shown by the element Te Se S Pb
24 Laughing gas is chemically NO N<sub>2O</sub> NO<sub>2</sub> N<sub>2</sub>O<sub>4</sub>
25 The brown gas formed when metal reduces HNO3is N<sub>2</sub>O<sub>5</sub> N<sub>2</sub>O<sub>3</sub> NO<sub>2</sub> NO
26 Oxidation of NO in air produces N<sub>2</sub>O N<sub>2</sub>O<sub>3</sub> N<sub>2</sub>O<sub>4</sub> N<sub>2</sub>O<sub>5</sub>
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
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