Carbon monoxide, carbon dioxide, coal, coke, lime, iron (II) oxide, iron (III) oxide, lime stone. The raw materials required for the extraction of iron from haematite are (i) ............ (ii) ............ and hot air. The mineral present in haematite is (iii) ........... which is reduced by (iv) ............ to iron

Carbon monoxide reacting with iron(III) oxide

In which of the following cases flux is required? (i) In the smelting of roasted zinc blende (ii) In the extraction of iron from haematite in the blast furnace. Explain. Mention the name of the flux with the purpose it serves where it is required.

Complete the following paragraph by filling in the blanks (i) to (x) with appropriate words: (i)............. forms the building material of our body. Potato is a good source of (ii) ............. Deficiency of protein and calories causes (iii) ............. and (iv) ................... respectively. Calçium play an important role in (iv) ....... . Oils are rich in (v) .................. fatty acids. Iron is essential for the formation of (vi) ............. in blood. Over-nutrition may lead to (vii) ......... and (viii) ................. Night blindness occurs due to deficiency of (ix) . ............ Vitamin B1 is also known as (x) ........

Give balanced equations for the following reactions : Iron oxide and reducing agent - carbon monoxide.

Among statements (a) - (d) , the correct ones are (a) Lime stone is decomposed to CaO during the extraction of iron from its oxides (b) In the extraction of silver , silver is extracted as an anionic complex. (c) Nickel is purified by Mond's process . (d) Zr and Ti are purified by Van Arkel method .

The conversion of pig iron to steel frequently requires the addition of: (I) oxygen or iron oxide (II) transition elements (III)inner transition elements (IV)silica

Limestone is present in the blast furnance production of iron in order to: (I) provide a source of CaO (II) remove some impurities (III) supply CO_(2)

Which of the following is a by product of Aerobic respiration? i. Carbon dioxide ii. Oxygen iii. Water iv. None of them