PPSC Chemistry Part III Inorganic Chemistry Online Test With Answers

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PPSC Chemistry Part III Inorganic Chemistry Online Test

Sr. # Questions Answers Choice
1 Pick out the incorrect statement. Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure. Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong. The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.
2 Phosphorus normally exhibit a covalency of. +1 and +2 +2 and +3 +3 and +4 +4 and +5
3 Nitrogen (N2)) is relatively unreactive because. Its electronegativity is high Its dissociation energy is large Its atomic radius is small It is the first element of group 15
4 After assimilation urea leaves behind in the soil NH3 CO2 Both A and B None of above
5 Ammonia is utilized for Manufacture of urea Oxidation to nitric acid Manufacture of ammonium sulphate All above
6 In urea the amount of nitrogen is 82.0% 46.0% 33.0% 21.0%
7 Urea is fertilizer Nitrogen fertilizer Potash fertilizer Phosphorous fertilizer Complete fertilizer
8 Commercial or the phosphoric acid is pure. 37.0% 82.98% 88.25% 90.12%
9 Formula of orthophosphoric acid. H2PO4 H3PO3 H3PO2 H4P2O5
10 Acid rain effects Human being Crops Aquatic life All above
11 Formula of orthophosphoric acid H2PO4 H3PO2 H3PO2 H2P2O5
12 Acid rain effects Human being Crops Aquatic life All above
13 Nitric acid is used in manufacturing of. Explosive H2SO4 Fertilizer All above
14 Nitric acid has the property <div>Nitrating</div> Reducing Redoxing None of above
15 Aque regia is made by dissolving a mixture of HNO3 and HCl with ratio. 1 : 1 1 : 3 1 : 2 1 :10
16 In Ostwald's process of manufacturing nitric acid a mixture of ammonia gas with air is mantained with ratio. 1 : 4 1 :3 1: 8 1 : 10
17 Nitric acid is used in the manufacturing of. Dyes Drugs Artificial silk All above
18 An explosive Nitroglycerine Trinitrotoluene Fluorine perchlorate All above
19 Since the acid gives both acidic and normal salts so the acid is. di acid di basic double salt Any of above
20 A red color gas, on condensing ti gives a dark blue liquid. NO N2O N2O3 N2O4
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