Addition of high proprotions of manganese makes steel useful in making rails of railrods , because manganse (i) Givens hartdness to steeel (II) Help the foramtiion of ocides of iron (iii) can remove oxy gen and sulpur (iv) Can show highest oxidation state of +7A. I,ii,iiiB. I,iiiC. ii,ivD. I,iii,iv

Addition of high proprotions of manganese makes steel useful in making

1.	Addition of high proprotions of manganese makes steel useful in making rails of railrods , because manganse (i) Givens hartdness to steeel (II) Help the foramtiion of ocides of iron (iii) can remove oxy gen and sulpur (iv) Can show highest oxidation state of +7A. I,ii,iiiB. I,iiiC. ii,ivD. I,iii,iv
Answer» Correct Answer - b

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Consider the following statements and arrange in the order of true/false as given in the codes. `S_(1)`:Cuprite, Limonite and Zincite are oxide ares `S_(2)` Magnesite and carnallite are magnesium ores `S_(3)`: Chalcocyte and azurite are ores of copper `S_(4)` Feldspar an mica minerals contain aluminium.A. TTTTB. FTFFC. FFTTD. TTFT
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Addition of high proprotions of manganese makes steel useful in making rails of railrods , because manganse (i) Givens hartdness to steeel (II) Help the foramtiion of ocides of iron (iii) can remove oxy gen and sulpur (iv) Can show highest oxidation state of +7A. I,ii,iiiB. I,iiiC. ii,ivD. I,iii,iv

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