____iron contains more percentage of carbon and other impurities like S, P, Si etc.

Assertion : Limestone added in the blast furnace decomposes to give CaO which forms slag in molten state and separates out from iron. Reason : The iron obtained from the blast furnace contains about 4% carbon and many impurities like S, P, Si, Mn, etc.

Statement 1: Limestone added in the blast furnace decomposes to give CaO which forms slag in molten state and separates out from iron. Statement 2 : The iron obtained from the blast furnace contains about 4% carbon and many impurities like S, P, Si, Mn, etc.

The carbonate of a metal is isomorphous with MgCO_(3) and contains 6.091 percentage of carbon. The atomic weight of metal is

An ion with mass number 37 possesses one unit of negative charge. If the ion contains '11.1 %' more neutrons than the electrons, find the symbol of the ion.

Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98% . It's molar mass is

A speaks truth in 75% and B in 80% of the cases.In what percentage of cases are they likely to contradict each other in narrating the same incident.

Concentrated Cu_2S is converted into oxide by roasting. How impurities like sulphur and phosphorus are removed in this process?

A compound contains 80% of carbon and 20% hydrogen. If the molecular mass is 30 calculate empirical formula and molecular formula.

What is the mass of Mg_(2) P_(2) O_(7) that can be obtained from 1g of a phosphorous containing organic compound by Carius method? Percentage of phosphorous in the compound is 31

Which of the following statements are wrong? i) Calcination is mainly used for carbonate ore to get its oxide ii) Hydrated ore and hydroxides become anhydrous by calcination iii) Impurities like S, As and Sb are removed in the form of elemental vapours by calcination iv) Roasting is an endothermic process v) Roasting is mainly applicable for sulphide ore to get its oxide vi) Some times as a result of roasting, higher oxidation state oxide gets converted into lower oxidation state oxide.