PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following is not an ore of nickel. Pentalandite Siderite Garnierite Nicollite
2 In nature nickel is found in the form of. Sulphides Silicates Arsenides All
3 Stainless steel consists of which elements. Fe only Cr only Fe and Ni Fe ,Ni and Cr
4 Which of the following statement is not true regarding Open Hearth process. No iron is lost The process is economical and simple Steel obtained is of high quality Scrap iron cannot be used in this process.
5 Iron which contains up to 1% carbon is called. Steel Cast iron Wrought iron Pig iron
6 How pig iron is usually obtained from iron pyrite Limonite Hematite Siderite
7 Which is the purest form of iron. Pig iron Cast iron Wrought iron Steel
8 How many varieties of commercial iron are known. 1 2 4 3
9 Which of the following is not an ore of iron. Haematite Magnetite Siderite Monazite
10 Which is the second most abundant element occurring the earth crust. Iron Cu Cr Ni
11 Which of the following is not alloy of aluminium. Aluminium bronze Magnalum Duralumin Stellite
12 Which of the following property is not related to aluminum. it is silvery white metal with brilliant lusture It is a very light metal with specific gravity as 2.7 It is good conductor of heat It is the least reactive element of III Group.
13 In Serpekr's process the ore is treated with which of the following. Carbon Nitrogen gas Both A and B None of these
14 Which of the following process is not involved in the purification of bauxite. Bayer's process Serpek's process Hall's process Goldsmith's process
15 Which of the following steps in involved in the metallurgy of aluminium. Purification of bauxite Electrolytic reduction of alumina Refining of aluminum All above
16 Which of the following impurities are present with the bauxite. Silica Ferric oxide Alumina Both silica and ferric oxide
17 Aluminum is usually extracted from Bauxite Corundum Feldepar Alumite
18 Which is not an ore of aluminium. Baxuite Cryolite Monazite Corundum
19 Aluminum occurs in nature as. Native Combined form Both native and combined Free
20 Which of the following is the third most abundant element in the nature. Oxygen Sulphur Aluminum Hydrogen
21 Copper is resistant to Air Water Acid and Alkali All of the above
22 in monel metal copper is alloyed wiht which metal. Fe Mn Ni All
23 In German Silver copper is alloyed with which metal. Zn Ni Ai Zn and Ni
24 Which of the following is an alloy of copper Brass Bronze Monel metal All
25 Which of the following statements correct regarding copper. It is used in electroplating Its salts are used as insecticides Its salts are used as coloring materials All are correct
26 Which of the following state is not true with respect to copper. it is malleable and ductile It is a best conductor of heat and electricity It forms alloys easily Moltan copper absorbed carbon dioxide
27 Hydrometallurgy of copper involves extraction of copper from poor ores by which process. Dry process Wet process Both dry and wet process None of these
28 Which of the following steps are involved in the extraction of copper. Roasting Smelting Refining All
29 Copper is mainly extracted from witch of the following ore Sulphide ores Carbonate ores Oxides ores Non sulphide ores
30 The formula of copper pyrite is. CuFeS CuFeS2 Cu2FEs Cu Fe2S
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