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 The principal ores of copper are Copper sulphides Copper oxides Both sulphides and oxides Copper carbonate
2 Copper occurs in nature as. Native Combined Both native and combined None of the above
3 Which of the following is the second anciently known metal. Nickel Copper Gold Silver
4 Carbon in wrought iron is present as Silicon carbide Iron carbide cementite Graphite Partly as iron carbide and partly as graphite
5 Stainless steel contains Fe+Cr+Ni Fe+Ni+Cu Fe + Cr+ Cu Cu + C + Ni
6 If steel is heated to a temperature well below red heated and is then cooled slowly the process is called. Annealing Quenching Tempering Nitriding
7 In the extraction of iron, the furnace change consists of iron ore, coke and limestone. The function of limestone is to act as. An oxidizing agent A reducing agent Flux Slag
8 Pig iron is also called. Cast iron Steel Wrought iron Stainless steel
9 In the fourth flotation process for the purification of ores, the ore particles floats because. They are light Their surface is not easily wetted by water They bear electrostatic charge They are insoluble
10 The most stable oxidation state of chromium is. +6 +3 +4 +2
11 Zeigler Natta catalyst is. Pt/PtO TiCl4/Al(C2H5)3 Pt/Rh Pt
12 Transition elements, in general, exhibit the following properties, except one, Name that property. Variable oxidation state Natural radioactivity Tendency to form complexes Formation of alloys
13 Which of the following statements is false about transition metals. They form complexes They show variable valency All transition metal compounds are paramagnetic They form coloured ions
14 Which one of the following ionsis colourless. Cu+ Ni2+ Co2+ Fe3+
15 Colour in transition metal compounds in attributed to Small sized metal ions Absorption of light in UV region Complete ns sub shell incomplete (n-1) sub shell
16 The maximum oxidation shown by managanese is. +2 +7 +4 +5
17 Variable oxidation states is shown by Normal eleemnts Metallic elements Non metallic elements Transition elements
18 Zinc oxide is. A basic oxide An amphoteric oxide An acidic oxide A neutral oxide
19 The rusting of iron is catalysed by which of the following. Fe O2 Zn H+
20 Finely divided iron combines with CO to give. Fe(CO)5 Fe2(CO)9 Fe(CO)12 Fe(CO)6
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