Recent questions in General Principals and Processes of Isolation of Metals

In a constant pressure process for $5$ mole of an ideal monoatomic gas, the temperature of gas increased from $300\;K$ to $500\; K$. Which of the following is incorrect regarding the process?

asked Jan 18, 2016 by meena.p

1 answer

Magnetic oxide of iron is

asked Mar 20, 2014 by meena.p

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For highly reactive metals like alkali and alkaline earth metals, only way of reduction is

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The salt which is likely to be found in plant is

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The ore having two different metal atoms is

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The Impurities present in bauxite are

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The collectors like pine oil xanthates and fatty acids are used during froth-flotation process of concentration of ores to

asked Mar 20, 2014 by meena.p

1 answer

The gemstone ruby is an impure form of alumina having impurity

asked Mar 20, 2014 by meena.p

1 answer

In the electrolysis of brine for the production of chlorine , the by products are

asked Mar 20, 2014 by meena.p

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The Ellingham diagram are constructed for the formation of oxides of elements and they can predict.

asked Mar 20, 2014 by meena.p

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Small pipes, called tuyeres, are kept at the sides of blast furnace from where

asked Mar 20, 2014 by meena.p

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In Ellingham diagram, a straight line is obtained except

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The process that is not carried out while doing the concentration of an ore is

asked Mar 20, 2014 by meena.p

1 answer

The blast furnace used for smelting is provided with double cup and cone arrangement to

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Van arkel method is generally used for

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Zone Refining is based on process of

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The gemstone Saphire is an impure form of alumina having impurity of

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The pulverization of ores is done during

asked Mar 20, 2014 by meena.p

1 answer

The froth stabilizers, generally used during froth-floatation

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1 answer

Zone Refing is generally carried out in inert atmosphere

asked Mar 20, 2014 by meena.p

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German silver does not have silver in it,its composition is

asked Mar 20, 2014 by meena.p

1 answer

The blast of hot air is introduced from tuyeres during extraction of iron at about.

asked Mar 20, 2014 by meena.p

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Among the following the wrong one is

asked Mar 20, 2014 by meena.p

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In goldsmith aluminothermic process, which of the following reducing agent is used.

asked Mar 20, 2014 by meena.p

1 answer

Mac Arthur Process is used for

asked Mar 20, 2014 by meena.p

1 answer

An Alloy is formed by mixing.

asked Mar 20, 2014 by meena.p

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The metal that is sometimes found native in nature .

asked Mar 20, 2014 by meena.p

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The one that is used automobiles and aeroplanes is.

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Silver containing lead as impurity is removed by.

asked Mar 20, 2014 by meena.p

1 answer

Pyrolusite is

asked Mar 18, 2014 by meena.p

1 answer

In extraction of iron the changes taking place in the blast furnace is

asked Mar 18, 2014 by meena.p

1 answer

Before introducing $FeO$ in blast furnace , it is converted to $Fe_2O_3$ by roasting so that

asked Mar 18, 2014 by meena.p

2 answers

Thomas stag is

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The substance not likely to contain CaCO3 is

asked Mar 18, 2014 by meena.p

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When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are?

asked Mar 18, 2014 by meena.p

2 answers

Silver containing lead as an impurity is removed by

asked Mar 18, 2014 by meena.p

1 answer

Cassiterite is an ore of

asked Mar 18, 2014 by meena.p

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Pyrolusite is a/an

asked Mar 18, 2014 by meena.p

1 answer

Among the following statements the incorrect one is

asked Mar 18, 2014 by meena.p

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Match correct answer using the codes given below :

asked Mar 18, 2014 by meena.p

1 answer

In Goldschmidt aluminothermic process, which of the following reducing agent is used

asked Mar 18, 2014 by meena.p

1 answer

Mac Arthur process is used for

asked Mar 18, 2014 by meena.p

1 answer

Heating of ore in the absence of air below its melting point is called

asked Mar 18, 2014 by meena.p

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Calcination is used in metallurgy for removal of?

asked Mar 18, 2014 by meena.p

1 answer

The method is very useful for preparing semiconductors is

asked Mar 18, 2014 by meena.p

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Cassiterite is concentrated by

asked Mar 18, 2014 by meena.p

1 answer

Cryolite is

asked Mar 17, 2014 by meena.p

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A basic lining is given to a furnace by using

asked Mar 17, 2014 by meena.p

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When a metal is to be extracted from its ore and the gangue associated with the silica, then

asked Mar 17, 2014 by meena.p

2 answers

The impurities associated with minerals used in metallurgy are called collectively?

asked Mar 17, 2014 by meena.p

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