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General Principles and processes of Isolation of Elements
medium
Addition of high proportions of manganese makes steel useful in making rails of railroads, because manganese
A
gives hardness to steel
B
helps the formation of oxides of iron
C
can remove oxygen and sulphur
D
can show highest oxidation state of $+7$
Solution
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Standard 12
Chemistry
Similar Questions
Match List $-I$ with List $- II$
List $- I$ (Ore) | List $- II$ (Element Present) |
$(a)$ Kernite | $(i)$ Tin |
$(b)$ Cassiterite | $(ii)$ Boron |
$(c)$ Calamine | $(iii)$ Fluorine |
$(d)$ Cryolite | $(iv)$ Zinc |
Choose the most appropriate answer from the options given below.
Match the method of concentration of the ore in column $I$ with the ore in column $II$ and select the correct alternate :
$I$ | $II$ | |
$X$ | magnetic separation.. | $(a)$ $Ag_2S$ |
$Y$ | froth floation | $(b)$ $FeCr_2O_4$ |
$Z$ | gravity separation | $(c)$ $Al_2(SiO_3)_3$ |
medium